Blood

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Unformatted text preview: BLOOD Extracellular fluid ~5L Plasma (fluid) + Cellular (formed) Elements Figure 16-1 Plasma 92% Water 7% Proteins (most made by liver) 1% Dissolved substances Nutrients Wastes Ions Gases Trace elements, vitamins Figure 16-1 Plasma Proteins Albumins Major contributor to colloid osmotic pressure - presence of proteins in the blood and not in the interstitial fluid causes water to move into the blood - pull of water into the blood via osmosis Globulins Defense against foreign invaders (antibodies = immunoglobulins) Fibrinogen Precursor to fibrin which forms clots Sequence of activation of clotting factors (other plasma proteins) that ultimately leads to production of fibrin Carriers in the blood used to increase solubility in water Steroid hormones Cholesterol Certain ions Example: Transferrin to transport iron (Fe2+) Hormones Enzymes Table 16-1 Figure 16-1 Erythrocytes RBC = red blood cell 5 million/L Gas transport Oxygen (O2) Carbon dioxide (CO2) Hematocrit estimate of RBC's % of RBC/plasma ~ 45% Components of Whole Blood Plasma (55% of whole blood) Buffy coat: leukocyctes and platelets (<1% of whole blood) whole blood) Formed elements 1 Withdraw blood 2 Centrifuge and place in tube Figure 17.1 Figure...
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This note was uploaded on 04/29/2009 for the course BIOL 425 taught by Professor Tondi during the Fall '08 term at George Mason.

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