KAAP221 Lecture Notes - Lecture 5: Coronary Artery Disease, Pulmonary Valve, Aortic Valve

• School: University of Delaware
• Department: Kinesiology & Appl Physiology
• Course: KAAP221
• Professor: Shannon Lennon

Document Summary

Lecture 5: coronary circulation - supplies blood to the heart itself, elastic rebound - allows heart to receive sufficient blood flow through its own circulation, maintains continuous blood flow through coronary circulation. Contraction of lv > forces blood into aorta, stretches elastic walls of aorta. Receive blood from ra through tricuspid valve (one of the av valves) Cusps attached to chordae tendineae; connect to papillary muscles. Blood exit through pulmonary valve to pulmonary trunk. Thicker muscle (produce more pressure, 4-6x) - because it has to pump to the whole body; overcome all that resistance from the aorta and arteries. Receive blood from la through mitral valve (l av valve); also called bicuspid valve. Blood exit through aortic valve into ascending aorta. Av valves are open: bp from contracting atria push cusp apart. Semilunar valves (aortic and pulmonary) are closed: little pressure from ventricles, bp from pulmonary and systemic circuits keep both valves closed.