HSCI 100 Lecture Notes - Lecture 6: Exhalation, Atherosclerosis, Hypoventilation

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Wrong blood cells will explode in the immune system. 3. regulation: body temp, water salt balance, body ph. Plasma (55%) 92% water, 8% salts and organic molecules. Medium which materials are transported by the blood. Osmotic pressure and transport of other molecules: globulins, fibrinogens. Transports lipids & fat soluble vitamins, some antibodies. Formed elements: from cells produced in red bone marrow (epiphysis of long bones) Hematopoiesis: process for blood stem cell differentiating into these different descendants. Fragments of large cells (megakaryocytes) made in red bone marrow. 200 bil made a day, life span 5-10days. Thrombin/fibrinogen important for blood clotting by generation fibrin threads that catch rbc. Step1: injured cells in walls of vessels and platelets release clotting factors. Step 2: clotting factors convert an inactive blood protein to prothrombin activator. Step 5: fibrin network traps rbc and platelets = blood clot! Pick up oxygen in the lungs and ferry it to all cells in body.

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