Home

What is the microscopic anatomical makeup of visceral muscles Quizlet

Study muscular Flashcards Quizle

Example of Visceral Smooth Muscles. Stomach, bladder, intestine, uterus, are all large soft hollow organs that stretch when muscle moves Binds together the cells/ fibers that make up the fascicle. Epimysium. Surrounds the groups of fascicles , is the outermost layer then later to release) Glucose. Primary energy source for all body. a chapter linking sentences with punctuation marks that regulate where a gene starts and ends, and which genes are read in which cell - the two strands that make up the DNA double helix are read by the cell in the 5 to 3 direction. the left strand is read from top to bottom, and the right strand is read from bottom to to

Visceral muscle tissue, or smooth muscle, is tissue associated with the internal organs of the body, especially those in the abdominal cavity. There are three types of muscle in the body: skeletal, smooth, and cardiac Membranes work in pairs parietal and visceral next to the organ and secrete serous fluid in between the two layers. Quickly memorize the terms phrases and much more. Anatomy Cells And Tissue Identification Flashcards Quizlet Body tissues conclusively make up body organs and various parts. Anatomy tissues quizlet. Learn vocabulary terms and more. What is the microscopic anatomical make-up of cardiac muscles? - 1418609 Termed unitary smooth muscle or visceral muscle, this type of smooth muscle is the most common observed in the human body, forming the walls of hollow organs. Single-unit smooth muscle produces slow, steady contractions that allow substances, such as food in the digestive tract, to move through the body

Cardiac Muscle Definition. Cardiac muscle, also known as heart muscle, is the layer of muscle tissue which lies between the endocardium and epicardium.These inner and outer layers of the heart, respectively, surround the cardiac muscle tissue and separate it from the blood and other organs. Cardiac muscle is made from sheets of cardiac muscle cells Muscle fibers can broadly be divided into 3 muscles types: skeletal, cardiac, and smooth muscle. This summary discusses the basic anatomy of skeletal muscle, key features of skeletal muscle histology and physiology, and important presentations of muscular disease

A sarcomere is the basic unit of muscle tissue in both cardiac and skeletal muscle. Sarcomeres appear under the microscope as striations, with alternating dark and light bands. Sarcomeres are connected to a plasma membrane, called a sarcolemma, by T-tubules, which speed up the rate of depolarization within the sarcomere The visceral reflexes are mediated by the autonomic nervous system (ANS), which has two divisions (sympathetic and parasympathetic). The target organs of the ANS are glands, cardiac muscle, and smooth muscle: it operates to maintain homeostasis. Control over the ANS is, for the most part, involuntary Microscopic Anatomy Of Liver Diagram Quizlet About 7085 of the liver volume is occupied by parenchymal hepatocytes. Microscopic anatomy of liver. Microscopic anatomy of the liver murli krishna md. Make up 15 of liver population perisinusoidal space site of exchange of material between blood and liver cells

Introduction. In this section we describe the anatomy at either extreme of the spectrum of sexual anatomical variation. In section 27.2, we will describe the variations of sexual anatomy that occur which are not easily characterized by this binary system of male or female.. Vulva. The mons pubis is a pad of fat that is located over the pubic bone. After puberty, it becomes covered in pubic hair The renal structures that conduct the essential work of the kidney cannot be seen by the naked eye. Only a light or electron microscope can reveal these structures. Even then, serial sections and computer reconstruction are necessary to give us a comprehensive view of the functional anatomy of the nephron and its associated blood vessels The muscular system is made up of specialized cells called muscle fibers. Their main function is contractibility. Muscles, connected to bones or internal organs and blood vessels, are in charge for movement. Almost every movement in the body is the outcome of muscle contraction

microscopic anatomy of muscle tissue Quiz - Quiziz

  1. Muscle tissue is characterized by properties that allow movement. Muscle cells are excitable; they respond to a stimulus. They are contractile, meaning they can shorten and generate a pulling force. When attached between two movable objects, in other words, bones, contractions of the muscles cause the bones to move
  2. the body tissue of the skeletal and visceral musculatures. Muscles enable animals and man to perform very important physiological functions, such as movement of the body or its individual parts, blood circulation, respiration, passing of chyme through the digestive organs, maintenance of vascular tonus, and excretion
  3. Cardiac muscle tissue is a specialized, organized type of tissue that only exists in the heart. It is responsible for keeping the heart pumping and blood circulating around the body. Cardiac muscle tissue, or myocardium, contains cells that expand and contract in response to electrical impulses from the nervous system
  4. Smooth muscle anatomy smooth muscle tissue is also known as visceral muscle tissue. 12 photos of the smooth muscle diagram. Thousands, or even tens of thousands, of small fibers make up each muscle. In addition, the contractile state of smooth muscle is controlled by hormones, autocrine/paracrine agents, and other local chemical signals
  5. The testes are two oval-shaped organs in the male reproductive system. We'll go over the different structures within each testis and how they function. You'll also learn about the kinds of.

Muscular System Flashcards Quizle

Anatomy 1 Quiz 1 Flashcards Quizle

The glomerulus is a high-pressure capillary bed between afferent and efferent arterioles. Bowman's capsule surrounds the glomerulus to form a lumen, and captures and directs this filtrate to the PCT. The outermost part of Bowman's capsule, the parietal layer, is a simple squamous epithelium 2 Disciplines of Anatomy • Anatomy is a relatively broad science because it can be divided into various disciplines. - Gross Anatomy (macroscopic): Study of stuff seen by the naked eye. - Microscopic Anatomy: Study of stuff seen ONLY with the microscope.Includes: • Histology - Study of tissue Body tissues conclusively make up body organs and various parts. Are you good at identifying the different tissues. Basically there are four types of tissues. Learn vocabulary terms and more with flashcards games and other study tools. Take up the quiz below and prove it. Choose from 500 different sets of anatomy tissues flashcards on quizlet composed of cardiac muscle. C)It has one atrium and two ventricles, and it is composed of visceral muscle. D)It has two atria and two ventricles, and it pumps blood directly into arteries. 28.Which statement most accurately describes the human heart? 29.Base your answer to the following question on the diagram below of the human heart and on you The diaphragm is an important muscle that helps you breathe in and out. We'll go over its different openings and functions before exploring the conditions that can affect the diaphragm. You'll.

Video: What is the microscopic anatomical make-up of visceral

The muscles of the human body are responsible for movement; there are some 700 named muscles in the body, and other smaller muscle tissues that are part of the heart, blood vessels and internal organs.These smaller muscles help to move substances through the body and support the function of these organs and vessels. Muscles make up about half the body's weight depending on a person's. TYPES OF MUSCLE TISSUE. There are three types of muscle tissues in the body: skeletal muscle, cardiac muscle, and smooth muscle. Let's discuss each in turn. Skeletal Muscle. Skeletal muscle is also known as voluntary muscle because we can consciously, or voluntarily, control it in response to input by nerve cells. Skeletal muscle, along with cardiac muscle, is also referred to as striated. Visceral sensory (afferent general and special visceral) Nerve cells are located in the inferior (nodose) ganglion of the vagus. They receive input from the chemoreceptors of the aortic body and other visceral structures. Axons then descend to the tractus solitarius after entering the medulla. General sensory (afferent general somatic Muscle cells, commonly known as myocytes, are the cells that make up muscle tissue. There are 3 types of muscle cells in the human body; cardiac, skeletal, and smooth. Skeletal muscle cells are long, cylindrical, multi-nucleated and striated . Each nucleus regulates the metabolic requirements of the sarcoplasm around it Smooth muscle, muscle that shows no cross stripes under microscopic magnification. It consists of narrow spindle-shaped cells with a single, centrally located nucleus. Smooth muscle tissue, unlike striated muscle, contracts slowly and automatically. It constitutes much of the musculature o

Smooth muscle tissue is found in the walls of hollow visceral organs, such as the stomach, urinary bladder, and respiratory passages. Its role is to force fluids and other substances through internal body channels. Like skeletal muscle, smooth muscle consists of elongated cells, but smooth muscle has no striations Anatomy of the Cardiovascular SystemChapter 18 557 Figure 18-1 Appearance of the heart. This photograph shows a living human heart prepared for transplantation into a patient. Notice its size relative to the hands that are holding it. 1. In anatomical terms, where is the heart located? 2. Name the layers of tissue that make up the pericardium. 3 Muscle Definition. A muscle is a group of muscle tissues which contract together to produce a force. A muscle consists of fibers of muscle cells surrounded by protective tissue, bundled together many more fibers, all surrounded in a thick protective tissue.A muscle uses ATP to contract and shorten, producing a force on the objects it is connected to Information. Muscular tissue is the third of the four major categories of animal tissue. Muscle tissue is subdivided into three broad categories: skeletal muscle, cardiac muscle, and smooth muscle. The three types of muscle can be distinguished by both their locations and their microscopic features. Skeletal muscle is found attached to bones Gross (macroscopic) anatomy is the study of body parts visible to the naked eye, such as the heart or bones. Histology is the study of tissues at the microscopic level. Cytology is the study of cells at the microscopic level. Physiology: Neurophysiology is the study of how the nervous system functions

Microscopic Anatomy Of Skeletal Muscle Flashcards Quizle

  1. General Structure of the Digestive System. The long continuous tube that is the digestive tract is about 9 meters in length. It opens to the outside at both ends, through the mouth at one end and through the anus at the other. Although there are variations in each region, the basic structure of the wall is the same throughout the entire length of the tube
  2. • epaxial muscles - muscles on the dorsal part of the body • hypaxial muscles - muscles on the ventral part of the body that are separated by the lateral septum (Fig. 10.26, p. 368) Fishes. In fishes, the trunk muscles remain divided into folded muscle segments or myomeres, that are divided into myosept
  3. Smooth Muscle Definition. Smooth muscle is a type of muscle tissue which is used by various systems to apply pressure to vessels and organs. Smooth muscle is composed of sheets or strands of smooth muscle cells. These cells have fibers of actin and myosin which run through the cell and are supported by a framework of other proteins. Smooth muscle contracts under certain stimuli as ATP is freed.
  4. The muscular system is an organ system, involved majorly in the movement of the body. There are nearly 700 muscles that are connected to the bones of the skeletal system, which roughly half make up the human's body weight. Every muscle is a different organ made of blood vessels, skeletal muscle tissue, nerves, and tendons
  5. Know the structural elements that harness muscle contraction (i.e., the shortening of myofibrils) to the movement of a body part (i.e., via connection to bone) as well as the mechanism by which muscle cells (skeletal, cardiac and smooth muscle) contract. Understand where stem cells are located in skeletal muscle and be able to identify their.

Study 47 Terms A&P Microscopic Flashcards Quizle

Muscle Tissue. Muscle tissue is composed of cells that have the special ability to shorten or contract in order to produce movement of the body parts. The tissue is highly cellular and is well supplied with blood vessels. The cells are long and slender so they are sometimes called muscle fibers, and these are usually arranged in bundles or layers that are surrounded by connective tissue Anatomical Position. To further increase precision, anatomists standardize the way in which they view the body. Just as maps are normally oriented with north at the top, the standard body map, or anatomical position, is that of the body standing upright, with the feet at shoulder width and parallel, toes forward.The upper limbs are held out to each side, and the palms of the hands face. Muscles make up approximately 40 percent of total weight. The heart is the hardest-working muscle in the body. It pumps 5 quarts of blood per minute and 2,000 gallons daily. The gluteus maximus is the body's largest muscle. It is in the buttocks and helps humans maintain an upright posture Smooth muscles are often grouped into two functional categories: single-unit and multiunit (fig. 12.35). Single-unit smooth muscles have numerous gap junctions (electrical synapses) between adjacent cells that weld them together electrically; they thus behave as a single unit, much like cardiac muscle.Most smooth muscles—including those in the digestive tract and uterus—are single-unit

A) chemical molecules make up cells. B) congenital defects can be life threatening. C) all levels of organization within an organism are interdependent. D) all organisms are composed of cells. E) all cells are independent of each other. C) all levels of organization within an organism are interdependent one of three smooth muscle bands that make up the longitudinal muscle layer of the muscularis in all of the large intestine except the terminal end tongue accessory digestive organ of the mouth, the bulk of which is composed of skeletal muscle transverse colon part of the colon between the ascending colon and the descending colo Visceral (Smooth) Muscle: Visceral muscle is found in various parts of the body including the blood vessels, the bladder, and the digestive tract as well as in many other hollow organs. Like cardiac muscle, most visceral muscle is regulated by the autonomic nervous system and is under involuntary control Skeletal muscle tissue is one of three types of muscle tissue commonly found in the body, along with cardiac and smooth muscle tissue. Skeletal muscle tissue generally allows for physical movements of all sorts. Skeletal muscles usually function in pairs, and their control is typically voluntary The way in which muscles and bones work together to exert forces is called biomechanics. How are bones and muscles connected? Tendons are bands of fibrous tissue that connect muscles to bones. The human body has more than 650 muscles, which make up half of a person's body weight

The lips cover the orbicularis oris muscle, which regulates what comes in and goes out of the mouth. The labial frenulum is a midline fold of mucous membrane that attaches the inner surface of each lip to the gum. The cheeks make up the oral cavity's sidewalls. While their outer covering is skin, their inner covering is mucous membrane Pleura is formed by an inner visceral pleura and an outer parietal layer. Between these two membranous layers is a small amount of serous fluid held within the pleural cavity. This lubricated cavity allows the lungs to move freely during breathing. In this article we will learn about the anatomy and function of the pleural cavity 1. The Human Body Has Over 600 Skeletal Muscles That Move Bones and Other Structures. Skeletal muscles attach to and move bones by contracting and relaxing in response to voluntary messages from the nervous system. Skeletal muscle tissue is composed of long cells called muscle fibers that have a striated appearance Adipose tissue can be found in a number of different places throughout the body. White adipose tissue is the most abundant type of fat in humans. It is distributed within subcutaneous fat, visceral fat, and bone marrow fat. Subcutaneous fat is found throughout the whole body, in the spaces between the skin and underlying muscles

ATI TEAS EXAM Flashcards Quizle

Cardiac muscle (also called heart muscle or myocardium) is one of three types of vertebrate muscles, with the other two being skeletal and smooth muscles. It is an involuntary, striated muscle that constitutes the main tissue of the walls of the heart Anatomy, Histology & Cell Biology PreTest Self-Assessment & Review (4th Ed.)[vickey The composition and density of proteins and molecules that make up the matrix varies with the different types of connective tissues. It is the specific composition of the cells, ground substance and the protein fibers that make up the connective tissue that gives it the ability to provide its specific function within the body

Visceral Muscle Tissue - Anatomy Pictures and Informatio

The peritoneum is a continuous transparent membrane which lines the abdominal cavity and covers the abdominal organs (or viscera). It acts to support the viscera, and provides a pathway for blood vessels and lymph. In this article, we shall look at the structure of the peritoneum, the organs that are covered by it, and its clinical correlations 3) Body Temperature Regulation. Heat is a byproduct of metabolism. Since skeletal muscles make up 40% of total mass of body, they play a major role in generating heat. During exercise, a large amount of heat is generated. In cold, muscles will shiver to produce heat Cardiac muscle is only found in the heart. Its fibers are longer than they are wide, and they are striated, like skeletal muscle fibers. But, unlike skeletal muscle fibers, cardiac muscle fibers have distinct ends to them, called intercalated discs. No striations are visible in smooth muscle under the microscope an elastic tissue that surrounds the muscle formed by parallel fascicles or groups, it consists of dense connective tissue, generally extended beyond the fleshy part of the muscle, forming a hard rope like tendon (think: outer

Anatomy Tissues Quizlet - Blogge

SDAR55 A&P I practice Kahoots - KellyWiggins Anatomy and Physiology I Chapter One and Two review 1.Define Anatomy and Physiology and explain their subdivisions Anatomy - form; scientific study of the body's structure. Gross anatomy - study of larger structures of the body (no microscope) Microscopic anatomy - study of structures only visible with microscope Regional anatomy - study. Figure 15.6 Comparison of Somatic and Visceral Reflexes The afferent inputs to somatic and visceral reflexes are essentially the same, whereas the efferent branches are different. Somatic reflexes, for instance, involve a direct connection from the ventral horn of the spinal cord to the skeletal muscle. Visceral reflexes involve a projection from the central neuron to a ganglion, followed by a. The visceral pleura is A.a double-layered serous membrane that anchors some of the abdominal organs to the body wall. B. the serous membrane that covers the lungs. C. the serous membrane that lines the abdominal and pelvic cavities. D. space located between the visceral and parietal pleura. E. the membrane that lines the pericardial sac In anatomy, the serous membrane (or serosa) is a smooth membrane that consists of a thin connective tissue layer and a thin layer of cells that secrete serous fluid. Serous membranes line and enclose several body cavities, known as serous cavities, where they secrete a lubricating fluid to reduce friction from muscle movements Smooth muscle in the walls of arteries is a critical component that regulates blood pressure necessary to push blood through the circulatory system; and smooth muscle in the skin, visceral organs, and internal passageways is essential for moving all materials through the body. Like cardiac muscle, smooth muscle is involuntarily controlled

What is the microscopic anatomical make-up of cardiac muscles

An artery is a blood vessel that conducts blood away from the heart. All arteries have relatively thick walls that can withstand the high pressure of blood ejected from the heart. However, those close to the heart have the thickest walls, containing a high percentage of elastic fibers in all three of their tunics Academia.edu is a platform for academics to share research papers

The small intestine is the part of the gastrointestinal tract that follows the stomach, which is in turn followed by the large intestine. The average length of the small intestine in an adult human male is 6.9 m (22 feet, 6 inches), and in the adult female 7.1 m (23 feet, 4 inches). The small intestine is divided into the duodenum, jejunum, and. Microscope Lab Report . Lab Five: Microscope and Simple Staining Introduction A microscope is a tool to examine enlarges image of small objects that are hard to study with the nake... Skeletal System Research Paper . This allows the bones in the body to move. Joints are a significant part of the movement of the body There are three types of muscles. They are the: Skeletal muscles, which move bones and other structures (e.g. the eyes); Cardiac muscles, which form most of the walls of the heart and adjacent great vessels, such as the aorta; Smooth or Visceral muscles, which form part of the walls of most vessels and hollow organs, move substances through viscera such as the intestine, and control movement.

• The visceral layer of the glomerular capsule is made up of specialized cells called podocytes, which surround the permeable capillaries. • Between the visceral and parietal layers of the capsule lies the capsular space, which collects the fluid and solutes being filtered from the blood. • Label this diagram Gross Anatomy of the Lungs. The lungs are pyramid-shaped, paired organs that are connected to the trachea by the right and left bronchi; on the inferior surface, the lungs are bordered by the diaphragm. The diaphragm is the flat, dome-shaped muscle located at the base of the lungs and thoracic cavity Bronchi are the main passageway into the lungs. When someone takes a breath through their nose or mouth, the air travels into the larynx. The next step is through the trachea, which carries the. The average volume of blood in an adult human body is... Term. anterior cerebral artery. Definition. Of the following arteries, the one involved in the make-up of the circle of willis is the... Term. inferior vena cava. Definition. The large vein that returns deoxygenated blood from the lower extremities and the abdomen to the right atrium of. 25.2 Microscopic Anatomy of the Kidney: Anatomy of the Nephron; 25.3 Physiology of Urine Formation: Overview The teniae coli are three bands of smooth muscle that make up the longitudinal muscle layer of the muscularis of the large intestine, fat-filled sacs of visceral peritoneum called epiploic appendages. The purpose of these is unknown

10.7 Smooth Muscle Tissue - Anatomy & Physiolog

Skeletal Muscle. Skeletal muscle is the most abundant tissue in the human body representing ∼40% of the body weight and ∼30% of the basal energy expenditure (Reid and Fielding, 2012). From: Conn's Handbook of Models for Human Aging (Second Edition), 2018. Download as PDF There are three main types of muscle tissue — visceral, cardiac and skeletal. Visceral muscle is also called smooth muscle. When compared to its counterparts under a microscope, it has a smooth appearance. Cardiac and skeletal muscles both have striations, or dark and light stripes running across them

Muscles are essential for movement. They provide power and motion, generate heat, and make breathing, circulation, and digestion possible. Find out more here The body of a nematode is long and narrow, resembling a tiny thread in many cases, and this is the origin of the group's name. The word nematode comes from a Greek word nema that means thread. The epidermis (skin) of a nematode is highly unusual; it is not composed of cells like other animals, but instead is a mass of cellular material and nuclei without separate membranes Skeletal muscle is one of the three types of muscles in the human body- the others being visceral and cardiac muscles. In this lesson, skeletal muscles, its definition, structure, properties, functions, and types are explained in an easy and detailed manner These muscle layers can contract, like your hands around a water balloon, in order to propel the urine down a canal connecting to the bladder that discharges urine to a place outside of the body. Main Difference - Somatic vs Autonomic Nervous System. Peripheral nervous system is the nervous system which is outside the brain and spinal cord. The main function of the PNS is to relay information between the central nervous system and the effector organs. Somatic and autonomic nervous system are the two parts of the peripheral nervous system (PNS)

Cardiac Muscle - Definition, Function and Structure

The Hand. The wrist consists of a series of short bones that are located distal to the ulna and radius, and proximal to the metacarpals. Within this small area of bones, there are various articulating surfaces within the wrist. The articulation between the proximal row of carpals and the radius is known as the radiocarpal joint; the. Muscle physiology Quizlet. Muscle Physiology. excitability is the ability of skeletal muscle to be stimulated by the nervous system, contractility is the ability of skeletal muscle to shorten, extensibility is the ability of skeletal muscle to lengthen.Nice work! You just studied 41 terms! Now up your study game with Learn mode Epimysiums surrounds a group of fascicles making the full muscle. The activity of smooth muscles allows lymph vessels to slowly pump lymph fluid through the body without a central pump or heart. By contrast, the smooth muscles in blood vessels are involved in vasoconstriction and vasodilation instead of fluid pumping. The outermost layer is the adventitia, consisting of fibrous tissue. It is made primarily. Definition. Cells. Term. Cerebropinal Nervous System; Consists of the brain, spinal cord, spinal nerves, and cranial nerves; Controls consciousness and many mental activities, voluntary functions of the five senses (seeing, hearing, feeling, smelling, and tasting), and voluntary muscle actions, including all body movements and facial expressions

Smooth muscles are non-striated like cardiac muscles, while skeletal muscles are striated. Each smooth muscle is spindle-shaped; skeletal muscles have no branches. When seen under the microscope, smooth muscle cells have only one nucleus located at the center. Skeletal muscle cells have more than one nucleus located along the whole tissue Nervous System Anatomy and Physiology. The nervous system is the master controlling and communicating system of the body. Every thought, action, and emotion reflects its activity. Its signaling device, or means of communicating with body cells, is electrical impulses, which are rapid and specific and cause almost immediate responses

Muscular System Anatomy: Overview, Gross Anatomy

Cardiac muscle differs from skeletal muscle in that Quizlet. Start studying Ch.18 Obj 8. Describe the structural and functional properties of cardiac muscle, and explain how it differs from skeletal muscle.. Learn vocabulary, terms, and more with flashcards, games, and other study tools Start studying Skeletal, Cardiac and smooth muscle.Learn vocabulary, terms, and more with flashcards, games. Muscle cells rarely act alone muscle organs operate on principle of graded strength motor units the functional unit of muscle system motor unit individual motor neuron and all muscle cells that it innervates the axon of a motor neuron usually branches on entering a muscle bundle and a single axon may innervate a few to 100s of muscle Structure. The peripheral nervous system is itself classified into two systems: the somatic nervous system and the autonomic nervous system.Each system contains 2 components: The afferent arm consists of sensory (or afferent) neurones running from receptors to the CNS. Afferent nerves detect the external environment via receptors for external stimuli such as sight, hearing, pressure. The heart is a critical organ that keeps blood moving throughout the body. Blood is an important medium that not only carries nutrients and oxygen throughout the body, but it also collects waste products and returns them to the liver and kidney for further processing and excretion.. The heart is able to achieve this autonomy based on its histological make-up Microscopic Anatomy. Historically, the prostate has been divided into 3 zones: (1) transition zone, (2) central zone, and (3) peripheral zone. The transition zone accounts for 10% of the prostatic glandular tissue and 20% of the adenocarcinomas. The prostate consists of approximately 70% glandular tissue and 30% fibromuscular stroma

17.3B: Microscopic Anatomy - Medicine LibreText

Smooth muscles, also called visceral muscles, make up various bodily organs. Most people don't think of the stomach, intestines, or veins as muscles, but the cells that make up these body parts are actually part of the involuntary motion system. Their actions — such as digestion, blood oxygenation, and waste removal — are not consciously. Hyperplasia. hyper = excessive, beyond; -plasia = formation, growth. An abnormal proliferation or increase in the number of cells that increases the size of a tissue or organ. For example, breast glandular epithelium hyperplasia, compensatory hyperplasia of the liver, and benign prostatic hyperplasia Figure 10.3.3 - Contraction of a Muscle Fiber: A cross-bridge forms between actin and the myosin heads triggering contraction. As long as Ca ++ ions remain in the sarcoplasm to bind to troponin, and as long as ATP is available, the muscle fiber will continue to shorten. Relaxation of a Muscle Fiber: Ca ++ ions are pumped back into the SR.

Adipose tissue is a specialized connective tissue consisting of lipid-rich cells called adipocytes. As it comprises about 20-25% of total body weight in healthy individuals, the main function of adipose tissue is to store energy in the form of lipids (fat). Based on its location, fat tissue is divided into parietal (under the skin) and visceral. Young's classification Type 1 make up 95% of posterior urethral obstruction, where there is a ridge on the floor of the urethra, continuous with the seminal colliculus. Anterior urethral valves are rarer than posterior urethral valves and often occur in the form of a diverticulum of the urethra. These valves form when there is a defect in the. Definition. Each muscle is served by one nerve, an artery , and one or more veins. Each skeletal muscle fiber is supplied with a nerve ending that controls contraction. Contracting fibers require continuous delivery of oxygen and nutrients via arteries. Wastes must be removed via veins Ventral cavity. Definition. 1-thoracic cavity divided from abdominal cavity by diaphragm, containes heart and lungs. mediastinum - space between lungs and the organs contained in that space. 2- Abdominopelvic upper region containing stomach most of intestine ,pancreas,liver,spleen and others Visceral peritoneum covers the external surfaces of most abdominal organs, including the intestinal tract. As seen in the diagram to the right, the intestines are, in essence, suspended from the dorsal aspect of the peritoneal cavity by a fused, double layer of parietal peritoneum called mesentery. In come cases, parietal and visceral. muscle cells, unique junctions called intercalated discs (gap junctions) link the cells together and define their borders. Intercalated discs are the major portal for cardiac cell-to-cell communication, which is required for coordinated muscle contraction and maintenance of circulation