ANAT 215 Lecture 29: Lecture 29
7 Aug 2015
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Lecture 29 ~ blood [transports nutrients; protects by wbcs, regulates temp. , ph, water, and bp] Viscosity: flows 5 times slower than water. Volume: 4-5 l in females, and 5-6 in males. The ph of blood is 7. 4 [alkaline]. Blood accounts for 8% of body weight. Formed elements [45%] non-true cells: no nucleus and no organelles [no reproduction, no metabolism] Form rouleaux to flow with minimal resistance. Life span is 120 days [cells become fragile]. 5 million cells / ml blood; 25 trillion cells in adult. Erythropoiesis in red bone marrow; 3 million/sec. Very flexible to change shape to fit into capillaries. 280 million hemoglobin/cell [95% of cell"s weight]. Leukocytes white blood cells [0. 1%] nucleated, 9,000 cells / ml, leukopoiesis lobed, granular & polymorphonuclear [weird] indented, agranular & mononuclear [huge] 4 days [con. tissue] d = 12-15 um.
