THE_HEART - THE HEART BSC to edit Click1086L Master...

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Click to edit Master subtitle style 11/29/10 THE HEART BSC 1086L
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11/29/10 219-2 Cardiovascular System Circuit
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11/29/10 319-3 Position, Size, and Shape Located in mediastinum, between lungs Base - broad superior portion of heart Apex - inferior end, tilts to the left, tapers to point 3.5 in. wide at base, 5 in. from base to apex and 2.5 in. anterior to posterior; weighs 10 oz
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11/29/10 419-4 Heart Position
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11/29/10 519-5 Pericardium Allows heart to beat without friction, room to expand and resists excessive expansion Parietal pericardium outer, tough, fibrous layer of CT Pericardial cavity filled with pericardial fluid Visceral pericardium (a.k.a. epicardium
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11/29/10 619-6 Heart Wall Epicardium (a.k.a. visceral pericardium) serous membrane covers heart Myocardium thick muscular layer fibrous skeleton - network of collagenous and elastic fibers provides structural support and attachment for cardiac muscle electrical nonconductor, important in coordinating contractile activity Endocardium - smooth inner lining
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11/29/10 719-7 Heart Chambers 4 chambers right and left atria two superior, posterior chambers receive blood returning to heart right and left ventricles two inferior chambers Atrioventricular sulcus- separates atria, ventricles Anterior and posterior sulci - grooves separate ventricles (next slide)
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11/29/10 819-8 External Anatomy - Anterior
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11/29/10 919-9 External Anatomy - Posterior
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11/29/10 1019-10 Heart Chambers - Internal Interatrial septum wall that separates atria Pectinate muscles internal ridges of myocardium in right atrium and both auricles Interventricular septum wall that separates ventricles Trabeculae carneae
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11/29/10 1119-11 Internal Anatomy - Anterior
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11/29/10 1219-12 Heart Valves Atrioventricular (AV) valves right AV valve has 3 cusps (tricuspid valve) left AV valve has 2 cusps (mitral, bicuspid valve) chordae tendineae - cords connect AV valves to papillary muscles (on floor of
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THE_HEART - THE HEART BSC to edit Click1086L Master...

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