Blood - BLOOD COMPONENTS OF BLOOD 1. Plasma - clear...

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BLOOD
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COMPONENTS OF BLOOD 1. Plasma - clear extracellular fluid 2. Formed elements - blood cells and platelets
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Formed Elements of Blood
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BLOOD FUNCTIONS Involved with respiration and nutrition Waste elimination Thermoregulation Immune defense Water and pH balance Others
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DEFINITIONS Hematocrit - % of total blood volume that is red blood cells Plasma - mixture of proteins, enzymes, nutrients, wastes, hormones, and gases Plasma proteins - albumins, globulins, fibrinogen Blood cells - erythrocytes (red) & leukocytes (white)
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DEFINITIONS Serum - blood plasma minus blood clotting proteins Heparin - anticoagulant which reduces the risk of blood clot formation by slowing down the conversion of prothrombin to thrombin
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BLOOD CELL PRODUCTION (Hemopoiesis) Yolk sac of an embryo produces stem cells that colonize The liver stops producing blood cells at birth, but the spleen and thymus produce WBCs. Lymphoid hemopoiesis occurs in lymphoid tissues (thymus, tonsils, lymph nodes, spleen & Peyers patches in intestines). Red bone marrow produces RBCs, WBCs and platelets. Stem cells called hemocytoblasts multiply continually & are pluripotent (capable of differentiating into multiple cell lines).
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Erythrocyte (RBC) Disc-shaped cell with thick rim 7.5 μ m diameter & 2.0 μ m thick at rim Major function is gas transport lost all organelles during maturation so has increased surface area/volume ratio 33% of cytoplasm is hemoglobin (Hb) O2 delivery to tissue and CO2 transport back to lungs
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Blood - BLOOD COMPONENTS OF BLOOD 1. Plasma - clear...

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