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anatomy - Final Lecture I Cardiovascular System Heart a...

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Final Lecture I. Cardiovascular System: Heart a. General Introduction i. Fist shaped ii. Apex- pointed end of heart iii. Base- Broad region of heart 1. Site of which vessels arise from b. Membranes i. Pericardium (double walled sac) 1. Epicardium- sub layer ii. Myocardium 1. Primarily made of cardiac muscle c. Chambers/Divisions i. Atrias- superior 1. Receive blood from veins a. Right atria- receives oxygen poor blood from vena cava b. Left atria- receives oxygen rich blood from the pulmonary veins ii. Ventricles- inferior 1. Pump blood into arteries; thicker walled for pumping action a. Right ventricle- pumps blood into the pulmonary trunk, whereby blood is taken to the lungs to be oxygenated b. Left ventricle- discharges blood into the aorta, where it is trans- ported out into blood vessels of the body iii. Interventricular Septum- Divides the heart into right and left iv. Schematic Diagram of Heart Divisions d. Heart Valves i. Atrioventricular Valves (AV) 1. Tricuspid- Right side of Heart a. Three heart strings called chordate tendineae which form from papillary muscle inside the heart.
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