PHGY 350 Study Guide - Midterm Guide: Tricuspid Valve, Aortic Valve, Interventricular Septum
12 Mar 2017
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Cardiovascular system: transports: o2 & co2, nutrients & waste, hormones & metabolites, regulates: temperature, fluid volume & ph. Cardiomyocytes: mononucleated, striated, intercalated discs (to work like one muscle), very aerobic (high in myoglobin and mitochondria) Conducting system: sa (sinoatrial) node = pacemaker intermodal pathway atrioventricular node av bundle (bundle of his) bundle branches purkinje fibers. 4 events of cardiac cycle: atrial systole, atrial diastole, ventricular systole, ventricular diastole ( 800msec between two successive heart beats) Phases of the cardiac cycle: atrial contraction. Isometric contraction: rapid ejection phase, reduced ejection phase, rapid filling phase, reduced filling phase. Cardiac output (co) = hr x sv (% of blood ejected from a ventricle each beat) Vd & (cid:271)lood supply: git urinary system. Vd & (cid:271)lood supply: conronaries skeletal muscles. Vc & (cid:271)lood supply: git urinary system skin. Preload: ventricular stretching at the end of diastole (determined by venous return (vr)
