PNB 2265 Chapter Notes - Chapter 2: Chordae Tendineae, Tunica Externa, Superior Vena Cava
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30 Jan 2017
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Heart facing towards you right side of heart is on your left and vice versa. Orient heart: anterior: pulmonary trunk exiting right ventricle branching into right and left pulmonary arteries which carry blood to the lungs. Interventricular sulcus: separates right and left ventricles, houses some of coronary blood vessels: apex: points towards left, aorta: posterior to pulmonary trunk (branches) Blood flows into heart via inferior and superior vena cava, enter right atrium. Right atrium to right ventricle out pulmonary trunk to lungs. Blood returns to the heart from the lungs via the pulmonary veins entering the left atrium. Left ventricle out the aorta (posterior to pulmonary trunk: aorta: 2 branches in sheep, 3 in human. Interior: atria: lined by ridge muscles (pectinate muscles, upper and lower chambers separated by av valves. Anchored by thin, white collagen filaments, chordae tendinae. Attached to wall of ventricles by papillary muscles. Pulmonary sl: right ventricle and pulmonary trunk.
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