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Transcript
The Anatomy of the Heart • How Does Blood Flow in the Heart? • Superior and inferior venae cavae • Large veins carry systemic blood to right atrium • Right atrium sends blood to right ventricle • Flows through right AV valve • Bounded by three cusps (tricuspid valve) • Cusps connected by chordae tendinae • Chordae attached to papillary muscles Copyright © 2007 Pearson Education, Inc., publishing as Benjamin Cummings The Anatomy of the Heart • How Does Blood Flow in the Heart? (cont’d) • Right ventricle pumps blood through pulmonary semilunar valve • Enters pulmonary trunk • Flows to lungs through right, left pulmonary arteries where it picks up oxygen • Pulmonary veins carry blood to left atrium • Left atrium sends blood to left ventricle • Enters through left AV valve (bicuspid or mitral) • Left ventricle pumps blood to aorta • Through aortic semilunar valve to systems Copyright © 2007 Pearson Education, Inc., publishing as Benjamin Cummings The Anatomy of the Heart • What is the Functional Anatomy of the Heart? • Left ventricular myocardium much thicker than right • Valves ensure one-way flow of blood • Prevent backward flow (regurgitation) Copyright © 2007 Pearson Education, Inc., publishing as Benjamin Cummings The Anatomy of the Heart • What is the Blood Supply to the Heart? • Coronary circulation meets heavy demands of myocardium for oxygen, nutrients • Coronary arteries (right, left) branch from aorta base Copyright © 2007 Pearson Education, Inc., publishing as Benjamin Cummings