ch_18_lecture_outline_a

Ch_18_lecture_outlin - 18 The Cardiovascular System The Heart Part A Heart Anatomy 0 Approximately the size of a fist 1 Location 0 In the

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18 The Cardiovascular System: The Heart: Part A Heart Anatomy 0. Approximately the size of a fist 1. Location 0. In the mediastinum between second rib and fifth intercostal space 1. On the superior surface of diaphragm 2. Two-thirds to the left of the midsternal line 3. Anterior to the vertebral column, posterior to the sternum 2. Enclosed in pericardium, a double-walled sac Pericardium 0. Superficial fibrous pericardium 0. Protects, anchors, and prevents overfilling Pericardium 1. Deep two-layered serous pericardium 1. Parietal layer lines the internal surface of the fibrous pericardium 2. Visceral layer (epicardium) on external surface of the heart 3. Separated by fluid-filled pericardial cavity (decreases friction) Layers of the Heart Wall 0. Epicardium—visceral layer of the serous pericardium Layers of the Heart Wall 0. Myocardium 4. Spiral bundles of cardiac muscle cells 5. Fibrous skeleton of the heart: crisscrossing, interlacing layer of connective tissue 6. Anchors cardiac muscle fibers 7. Supports great vessels and valves 8. Limits spread of action potentials to specific paths
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Layers of the Heart Wall 0. Endocardium is continuous with endothelial lining of blood vessels Chambers 2. Four chambers
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This note was uploaded on 07/08/2011 for the course BIOL 2402 taught by Professor Sledge during the Spring '11 term at Lone Star College System.

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Ch_18_lecture_outlin - 18 The Cardiovascular System The Heart Part A Heart Anatomy 0 Approximately the size of a fist 1 Location 0 In the

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