Blood Vessels + Blood Figs BW

Blood Vessels - P Inhala-tion Fluid Exchange Across Capillaries Interstitial Fluid-BP High BP Low From Arterioles To Venules Outward Fluid Movement

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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 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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Structure of Blood Vessels Capillary Bed Precapillary sphincter Lumen
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Blood Flow in Veins Closed valve Open valve Contracting skeletal muscle Higher P Lower
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Unformatted text preview: P Inhala-tion Fluid Exchange Across Capillaries- Interstitial Fluid -BP High BP Low From Arterioles To Venules Outward Fluid Movement Driven by Blood Pressure Osmotic P Low Inward Fluid Movement Driven by Osmotic Pressure Osmotic P High Net Movement Out Net Movement In • H 2 • Na + , K + , Ca 2+ , Mg 2+ , 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 10 6 / µ l • Leukocytes (WBCs, 7 types) 5-10 x 10 3 / µ l • Platelets Blood Cells Macrophages * * Phagocytes * * Leuko-cytes EPO Blood Clotting...
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This note was uploaded on 04/17/2009 for the course BISC 220 taught by Professor Mcclure during the Spring '09 term at USC.

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Blood Vessels - P Inhala-tion Fluid Exchange Across Capillaries Interstitial Fluid-BP High BP Low From Arterioles To Venules Outward Fluid Movement

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