Blood_Vessels_+__Blood_Figs_BW_3-11

Blood_Vessels_+__Blood_Figs_BW_3-11 - - Interstitial Fluid...

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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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Fluid Exchange Across Capillaries
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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 / l Leukocytes (WBCs, 7 types) 5-10 x 103 / l Platelets Blood Cells Macrophages * * Phagocytes * * Leuko-cytes EPO Blood Clotting...
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Blood_Vessels_+__Blood_Figs_BW_3-11 - - Interstitial Fluid...

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