PHYSCI 107 Lecture Notes - Lecture 7: Anterior Interventricular Branch Of Left Coronary Artery, Posterior Interventricular Artery, Chordae Tendineae
16 Apr 2016
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Document Summary
Closed loop system- 2 receiving and 2 pumping chambers. Heart and root of great vessels in mediasinum (space above diaphragm, between lungs, superior part of mediasinum contains great vessels (2nd rib)) Anterior access to heart (apex of heart on let side) Layers of connecive issue found on a lot of visceral structures. Visceral pericardium: secretes serous luid which provides lubricaion o. Funcion: decreases fricion and move freely while beaing. Three layers of the heart wall: epicardium: visceral layer, outer layer, myocardium: middle and thickest layer, endocardium: connecive issue lining of heart. Ventricular myocardium: right ventricle: thinner compared to let. 3: circular and spiral cardiac muscle: atria muscle is circular (squeeze blood from atria -> ventricle), Let ventricle: thicker myocardium, 3x thicker, pumps blood to whole systemic system, ___ Interventricular septum: ventricular muscle is spiral (ventricles have to push blood up into the aorta against gravity)
