ANP 1105 Chapter Notes - Chapter 5: Bone Marrow, Polycythemia Vera, Vascular Smooth Muscle
30 Mar 2016
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Iniiate by the pumping acion of the heart. When blood difuses across capillary walls, o2/nutrients leave the blood + enter issues and co2/wastes move from issues to bloodstream. O2-deicient blood leaves capillary beds veins heart. Returning blood lows from heart lungs to pick up o2 heart pumped to body again. Looks thick/homogenous but it really has cellular/liquid components. Blood = specialized ct where living blood cells (= formed elements) are suspended in nonliving luid matrix (= plasma) Centrifuging reveals: heavier formed elements at botom, --dense plasma at top, ***fig 17. 1, reddish mass @ botom = erythrocytes (rbcs that carry o2) Hematocrit values in > hematocrit values in : thin/whiish layer (= bufy coat) lays between erythrocyte-plasma juncion. 1% of tot vol: plasma remaining 55% tot vol. Blood sicky, opaque luid w/ metallic taste. Blood density/viscosity > water density/viscosity: due to formed elements. Avg blood vol in > avg blood vol in .
