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Ch. 13 - Blood - The Cardiovascular System Blood...

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The Cardiovascular System Blood
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Cardiovascular System Consists of 3 components Blood Formed Liquid Vessels Arteries, arterioles, capillaries, venules, veins Heart
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Functions of Blood Transportation Oxygen Carbon dioxide Nutrients Hormones Waste
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Functions of Blood Regulation pH Body temperature Water content of cells (by osmosis) Protection Clotting Combating toxins and microbes
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Physical Characteristics of Blood Viscosity (thickness) greater than that of water Temperature of 38 °C (100.4 °F) pH of 7.35-7.45 8% of body weight Volume is 4-6 L (more in ♂ than ♀) Color varies – Highly O 2 – red while non-O 2 – dark red/purple
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Components of Blood Formed elements (45%) RBC (erythrocytes) Hematocrit % of total blood volume occupied by RBC WBC (leukocytes) Platelets (thrombocytes)
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Components of Blood Liquid elements (55%) Plasma (91.5% water and 8.5% solutes) Proteins Albumins, globulins, fibrinogen Nutrients Vitamins Hormones Respiratory gases Electrolytes Waste
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Blood Plasma Plasma Proteins Most abundant of the dissolved solutes in plasma. Three main groups Albumins Globulins fibrinogen
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Albumins (60% of plasma proteins) Smallest of the plasma proteins Synthesized in the liver Important in osmotic pressure Helps regulate water movement between the blood and the tissues Globulins (36% of plasma proteins) Synthesized in the liver Alpha and beta (transport lipids and fat-soluble vitamins) Synthesized in the lymphatic tissues Gamma (constitute a type of antibody)-antibodies produced during certain immune response Blood Plasma
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