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Blood Vessels - Interstitial Fluid-BP High BP Low From...

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Outline A. Physical Principles Governing Blood Flow B. Structure and Function of Vessels C. Capillary Function D. Composition of Blood E. Blood Clotting 0 Blood Vessels & Blood
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Physics of Blood Flow Fluids flow down pressure gradients Higher P Lower P FLOW Pressure can change without a change in volume FLOW Flow rate is proportional to the pressure gradient Flow rate is inversely proportional to total CSA FLOW Fast Slow Fast FLOW
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Blood Pressure, Velocity, and CSA
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Structure of Blood Vessels Capillary Bed Precapillary sphincter Lumen (Pl. Lumina)
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Precapillary Sphincters Regulate Capillary Flow (Bypass)
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Blood Flow in Veins Closed valve Open valve Contracting skeletal muscle Higher P Lower P Inhala- tion
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Unformatted text preview: - Interstitial Fluid -BP High BP Low From Arterioles To Venules Outward Fluid Movement Driven by Blood Pressure Inward Fluid Movement Driven by Osmotic Pressure Net Movement Out Net Movement In • H 2 • Na+, K+, Ca2+, Mg2+, Cl-, HCO 3-, other ions • Proteins • Nutrients • Wastes • O 2 , CO 2 • Hormones Composition of Blood Plasma (55 %) Cells (45 %) • Erythrocytes (RBCs) 5-6 x 106 / μ l • Leukocytes (WBCs, 7 types) 5-10 x 103 / μ l • Platelets Blood Cells Macrophages * * Phagocytes * * Leuko-cytes EPO Blood Clotting...
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