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1. mainly cardiac muscle 2. thickest layer 3. contains tissue to conduct electrical current 4. contains a connective tissue fiber skeleton: the fibrous skeleton of the heart 1. anchors cardiac muscle 2. reinforces cardiac muscle 3. provides support for great vessels 4. limits spread of action potentials to specific pathways 3. endocardium
Cardiac muscle fibers cells also are extensively branched and are connected to one another at their ends by intercalated discs. An intercalated disc allows the cardiac muscle cells to contract in a wave-like pattern so that the heart can work as a pump.
Aug 17, 2023 · The terminal arborization of the right branch supplies the papillary muscle and recurs to supply the rest of the ventricular wall. The left bundle branch or crus sinistrum (Latin) branches from the atrioventricular bundle at the start of the muscular interventricular septum.
1. The heart is located in the _____________ cavity between ______________. 2. The midline partition containing the heart is called the ___________________. 3. The heart lies ____________________ in the ____________________. a. The base is directed ________________________________________. b.
Cardiac Muscle Fibers (Myocytes) There are two basic types of cardiac myocytes, those specialized for contraction and those specialized for impulse conduction.
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This chapter outlines the anatomy, physiology, and pathophysiology of the heart, linking the micro- and macroscopic structure of cardiac muscle fiber to its function during contraction and relaxation. The properties of cardiac muscle cells and the process of contraction at a cellular level are also described.
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In most hearts the node is located in the terminal groove lateral to the superior cavoatrial junction, but in 10% of hearts it is a horseshoe-shaped structure straddling the crest of the atrial appendage. A and b denote the body and tail of the node, respectively. B. Atrioventricular (AV) node.
