BIOL 1344 Lecture Notes - Lecture 5: Posterior Interventricular Sulcus, Anterior Interventricular Sulcus, Simple Squamous Epithelium
14 Sep 2016
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Document Summary
Extends between 2nd rib and 5th rib. 300 g in weight, size of fist. Base us top of heart > fills from the top, empties from top. Myogenic: needs no nervous input to beat [human] Excess fluid > inflammation of serous pericardium > heart. Myocardium: muscular, thickest, involuntary, striated [have sarcomeres], branched. Pulmonary circuit > blood to lungs + back. Circulation time [blood to entire body]: 1 minute. Renewal of blood in lungs: 5 times/minute. If higher, h2o will leak out > pulmonary edema at high altitude. Coronary arteries: originate from the base of aorta, blood flow during diastole. Blockage of coronaries: ischemia: decreased blood flow > myocardial infarction > heart attack. Can be caused by fat deposition > atherosclerosis. Rough > blood clot > thrombus > free floating clot > in brain > stroke. Calcium deposit in aorta: aortic aneurysm > ballooning of aorta; if. Mitral or bicuspid valves- 2 cusps, left side > may go bad.
