PHGY 210 Study Guide - Aortic Arch, Vascular Resistance, Vasoconstriction
14 May 2012
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The blood is not always in the vessels. 1 new and old blood mix in the ventricle. The systemic and pulmonary circulations are in series with one another. Within the systemic circulation there is a parallel system that brings blood to all organs. Note: arterial system = resistance; venous system = capitance. He stuck a glass tube in the artery of a horse and measured blood pressure according to the height of the blood column. Blood stops going up when it gets to equilibrium with atmospheric pressure. 1: 2m of blood = 200cm of h2o = 14,2cmhg = 142mmhg. We now measure central venous pressure with a catheter that we insert in one of the two jugular veins so that it gets in the right atrium. We can also use the observation of the jugular vein to figure out the central venous pressure.
