The Cardiovascular Syste1

The Cardiovascular Syste1 - The Cardiovascular System The...

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The Cardiovascular System: The Heart Heart Anatomy Size: 250-350 grams Location: extends 12-14 cm within mediastinum, from 2 nd rib to 5 th intercostal space Orientation: anterior to vertebral column; posterior to sternum; intermediate to lungs - base: posterior aspect; mainly left atrium - apex: inferolateral aspect Pericardium : double-walled sac enclosing heart - Fibrous pericardium: outer dense connective tissue layer o anchors heart to surrounding structures (diaphragm, vessels) o prevents overfilling with blood - Serous pericardium: deep to fibrous pericardium o parietal layer: lines internal surface of fibrous pericardium o visceral layer (epicardium) – deep to parietal layer; outer layer of heart wall Layers of heart wall: - epicardium : visceral layer of serous pericardium; often accumulates fat - myocardium : cardiac muscle deep to epicardium; bulk of heart tissue o branched cardiac muscle cells linked by connective tissue fiber bundles (collagen & elastin) – fibrous skeleton of heart
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This note was uploaded on 12/04/2011 for the course ANTHRO 2000 taught by Professor Monicaoyola during the Fall '10 term at Broward College.

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The Cardiovascular Syste1 - The Cardiovascular System The...

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