PSL301H1 Lecture Notes - Lecture 6: Mitral Valve, Pulmonary Valve, Tricuspid Valve
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Document Summary
Heat is a pump in a closed system. Function of circulatory system: transport/distribute substance to tissues, remove waste, cargo: oxygen and nutrient, regulates body temperature, deliver hormones --> humoral communication. Right ventricle pulmonary trunk pulmonary arteries lungs oxygenated blood to pulmonary veins. Left ventricle aorta with oxygenated blood arteries and to each organ to arterioles and capillaries. *right side and left side of the heart work together because it"s a closed system, if one side fails, blood will get stuck at one end. Base is at the top, apex is the bottom. Pericardium: fluid filled sac around heart lubricate the heart if inflammation occurs, will cause damage to heart as it pumps. Myocardial muscle cells: single nucleus, specialized junctions (intercalated disks) syncytial network: myocyte connections (one cell connecting to many other cells, like dominos) Desmosomes: hold cells together, as heart fills with blood stretching of muscles.
