KNES 260 Lecture Notes - Lecture 4: Pacemaker Potential, Coronary Circulation, Threshold Potential
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20 Jan 2017
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The left side of the heart has thicker muscle walls so it can generate more pressure to push the blood farther out into the body. The coronary arteries run on the outer surface of the heart (if they were on the inside they could easily be crushed during contraction) The left artery runs along the septum (division between the two sides of the heart) The fibres in the heart are orientated in a twisting way that goes towards the apex of the heart. This allows for a more effective contraction of the ventricles and more blood to be pushed out of the heart (called ventricular torsion) It also created a vacuum in the ventricles so as to easier bring in blood from the venous system. Acts as a constraint (limits the space the heart can take up) Ventricular interaction: when one ventricle fills more or less than normal so the other ventricle does the opposite to compensate.
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