BIOD33H3 Lecture Notes - Lecture 6: Coronary Circulation, Cardiac Muscle, Cuttlefish

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24 Oct 2018
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Myocardium can be pakcked with solids, so the cells are closely packed together. In humans and mammals they are close together, connected by gap junctions, everything forms an electrical continuum. The myocardium get their o2 from coronary circulation. In humans they come off the base of the aorta, fill with blood during diastole, bc during systole the valve is closed, so get most filling during diastole. This allows for full oxygenated blood to go thru out the myocardium. So the heart muscle is well o2genated. Spongy myocardium where the cells are not in close proximity, and there are no coronary arteries so no coronary circulation. These get blood supply from blood flowin gthru them and between the cells. So they get blood from whatever chamber they happen to be in. Cells on right side might not get as much o2 as cells on the left side.

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