ch19 - BIO 2401 HEART STRUCTURE page 1 THE HEART consists...

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BIO 2401 HEART STRUCTURE page 1 THE HEART y consists of outer covering and inner walls; chambers; valves y covering = fibrous pericardium and serous pericardium y fibrous pericardium = loose-fitting pericardial sac that protects heart and anchors it to surrounding structures (diaphragm); prevents overfilling of heart with blood y serous pericardium = parietal and visceral layers with fluid in between; lines surfaces and provides a friction-free environment y wall = 3 layers y epicardium = visceral pericardium; often infiltrated by fat y myocardium = cardiac muscle; contractile layer y endocardium = endothelium = sheet of squamous epithelium resting on a thin connective tissue layer; is found in chambers of heart, on surface of valves; and in blood vessel walls entering and leaving heart y chambers y atria (singular = atrium); lies superiorly; have wrinkled protrusions called auricles; thin walled; not terribly contractile y superior vena cava (carries blood from regions superior to diaphragm); inferior vena cava (carries blood from regions inferior to diaphragm); and
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This note was uploaded on 01/09/2011 for the course BISC BISC 2135 taught by Professor Cullinan during the Fall '10 term at Marquette.

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ch19 - BIO 2401 HEART STRUCTURE page 1 THE HEART consists...

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