Blood - Blood a. Fluid connective tissue i. Consists of...

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a. Fluid connective tissue i. Consists of cells suspended in a liquid fibrous matrix. ii. Blood cells = formed elements iii. Liquid matrix = plasma. b. Formed elements consist of erythrocytes (red blood cells), leukocytes (white blood cells) and platelets. Centrifuged blood divides into 3 portions a. Plasma b. Packed RBCs (42-52% in ♂ and 37-47% in ♀. This % = hematocrit.) c. Buffy layer containing WBCs and platelets. (<1%) Physical characteristics a. Color ranges from scarlet (oxygen-rich) to dark red (oxygen poor). b. Viscosity is 5x that of water, due primarily to the presence of formed elements. c. pH normally ranges from 7.35-7.45 (slightly alkaline). d. Temperature is typically 100°F. e. Volume is 4-5 L for females and 5-6 L for males. Distribution functions a. Carries O2 (from lungs) and nutrients (from GI tract and body stores) to all cells b. Carries wastes from all cells to elimination sites (lungs for CO2; kidneys for nitrogenous wastes c. Carries hormones (chemical signals) from endocrine organs to target tissues. . Regulatory functions
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This note was uploaded on 11/22/2011 for the course BSC BSC1085 taught by Professor Sharonsimpson during the Fall '10 term at Broward College.

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Blood - Blood a. Fluid connective tissue i. Consists of...

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