PPT-Cardiac Muscle

The third category of muscle is cardiac muscle which makes up most of the heart Like skeletal muscle it is striated Like smooth muscle it can propagate action potentials from cell to cell There . Cycle: . diastole Phase. A heartbeat is a two-part pumping action that takes about a second. . This part of the two-part pumping phase (the longer of the two) is called . diastole. .. Diastole. begins as the ventricles start to relax. Soon the pressures within the aorta and pulmonary artery exceed ventricular pressures, causing the . . Digital . Laboratory. It’s best to view this in . Slide Show . mode, especially for the quizzes.. This module will take approximately . 45 . minutes to complete. .. After completing this exercise, you should be able to. What is Muscle Tissue?. Composed of cells that are highly specialized to shorten in length by contractility.. Made up of cells that are called . myocytes. .. Elongated in one direction (muscle . fibres. Dr. Ayisha Qureshi . Assistant Professor,. MBBS, MPhil. Location of the Heart:. The Pericardium & the Pericardial Sac: . The . heart is enclosed in the double-walled, membranous . pericardial sac . Muscle Tissue Characteristics. Contractile. Made of contractile proteins. Cells are called fibers. Skeletal Muscle. 40% of body weight. Under voluntary control; attached to skeleton. Striated, or banded, appear. Pamela BL. Introduction . The cardiac muscle forms the muscular wall of the heart that is it forms the myocardium.. Some of the cardiac muscle is also present in the walls of the aorta, pulmonary vein and superior vena cava.. Composed of cells that are highly specialized to shorten in length by contractility.. Made up of cells that are called . myocytes. .. Elongated in one direction (muscle . fibres. ).. Special Terms. Plasma Membrane . Histology Lecture . Series. Larry . Johnson, Professor. Veterinary Integrative Biosciences. Texas A&M University. College Station, . TX 77843. Muscle. – Introduction. Contractivity. is one of the . By. Zohreh. . Rahimi. Professor of Clinical Biochemistry. 1. TESTS OF LIVER INJURY. PLASMA ENZYME LEVELS. As metabolically complex cells, hepatocytes contain high levels of a number . of . enzymes. With liver injury, these enzymes may leak into plasma and can . Contractile. Made of contractile proteins. Cells are called fibers. Skeletal Muscle. 40% of body weight. Under voluntary control; attached to skeleton. Striated, or banded, appear. ance. Cells have multiple nuclei. Understandings. U.D.4.1: structure of cardiac muscle cells allows propagation of stimuli through the heart wall. . U.D.4.2: signals from the sinoatrial node that cause contraction cannot pass directly from atria to ventricles.. It’s best to view this in . Slide Show . mode, especially for the quizzes.. This module will take approximately 45 minutes to complete.. After completing this exercise, you should be able to:.  . Distinguish, at the light microscope level, each of the following::. . Symaptholytics. Sensitivity of receptors. Two Families:. Alpha and Beta. Based on affinity to adrenergic agonists. Alpha affinity:. epinephrine. ≥norepinephrine. >> . isoproteranol. Beta affinity:. The muscular . tissue consists . of all the muscles of the body. These make up . almost 42. % of total body weight, and are composed of . long cells . known as fibers. The fibers are different lengths and vary in color from white to deep red.