4.circu

4.circu - Cardiovascular physiology II the vasculature The...

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HKin 191 1 Cardiovascular physiology II: the vasculature The vascular system Outline 1) The vessels: arteries, veins and capillaries 2) Blood distribution 3) Diffusion 4) Hemodynamics 5) Blood pressure 6) Blood pressure during exercise
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HKin 191 2 Cardiovascular physiology 2: the vasculature Key concepts Blood vessels both actively and passively control blood flow There are 2 principal circularity systems: how, and way do they differ Diffusion: what sets diffusion rates and how are circulatory systems optimised for diffusion (Fick’s equation) Flow, pressure and resistance: how are they related (Poiseuille’s equation) Blood flow: matching demand to supply Blood pressure is regulated by hormones and neurons Integrating flow and resistance: why does blood pressure stay low in athletes
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HKin 191 3 The vascular system Outline 1) The vessels: arteries, veins and capillaries Cardiovascular physiology II: the vasculature
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HKin 191 4 1) The vessels: arteries, veins and capillaries Blood vessels: arteries
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HKin 191 5 Blood vessels: arteries Functions: Figures from: Berne and Levy, Principles of Physiology, 2000. 1) The vessels: arteries, veins and capillaries
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HKin 191 6 flow constricted dilated flow Blood vessels: arteries Functions: regulate blood flow • vasodilate:____________________ • vasoconstrict: _____________________ 1) The vessels: arteries, veins and capillaries
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HKin 191 7 Blood vessels: arterioles and metarterioles • efferent blood distribution system (from arteries to capillaries) regulate blood flow from arteries into capillaries 1) The vessels: arteries, veins and capillaries
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HKin 191 8 Figure 21-3 Blood vessels: arterioles and metarterioles 1) The vessels: arteries, veins and capillaries
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HKin 191 9 Blood vessels: capillaries 1) The vessels: arteries, veins and capillaries
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HKin 191 10 Blood vessels: capillaries Blood b tissue transfer occurs by: 1) diffusion (primary method) 2) filtration e.g. _______________________ 3) pinocytosis 1) The vessels: arteries, veins and capillaries
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HKin 191 11 Blood vessels: venules • coalescing vessels 1) The vessels: arteries, veins and capillaries
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