9 Cardiovascular 2 The Heart

9 Cardiovascular 2 The Heart - bicuspid or mitral between...

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Cardiovascular System I. Circulation A. Comparative circulatory anatomy B. Blood vessel geometry C. Blood pressure and velocity of blood flow D. Structure and function of blood vessels II. The Heart A. Anatomy B. Electrical activity C. Cardiac cycle III. Cardiovascular Regulation and Disease
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“Living World” - Franklin Institute Ventricles Atria Aortic arch By the end of a long life, a  person's heart may have  beat (expanded and  contracted) more than 3.5  billion times. In fact, each  day, the average heart beats  100,000 times, pumping  about 2,000 gallons (7,571  liters) of blood.
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Fig. 42.7: The Mammalian Heart
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Cross-section of Normal Heart left ventricle right ventricle
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knp high pressure high pressure Valve Opened Due to Higher Upstream Pressure Valve Closed Due To Higher Downstream Pressure muscle force muscle force Heart Valves: • atrioventricular (AV) valves between atria and ventricles:
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Unformatted text preview: bicuspid or mitral between left atrium and left ventricle tricuspid between right atrium and right ventricle semilunar valves between ventricles and arteries leaving heart: aortic valve between left ventricle and aorta pulmonary valve between right ventricle and pulmonary artery Valves are unidirectional: allow flow in only one direction closing of valves make lub-dup sounds of heartbeat heart murmur results from leaky or partially blocked valve Coronary Arteries: Supply Blood to the Heart Muscle aorta Signals spread throughout ventricles. 4 Purkinje fibers Pacemaker generates wave of signals to contract. 1 SA node (pacemaker) ECG Signals are delayed at AV node. 2 AV node Signals pass to heart apex. 3 Bundle branches Heart apex Fig. 42.9 - Electrical Activity of the Heart P wave QRS wave T wave...
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This note was uploaded on 10/21/2011 for the course BIO 102 taught by Professor Robinson during the Spring '09 term at UPenn.

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9 Cardiovascular 2 The Heart - bicuspid or mitral between...

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