IMG_0011 - Thrornbus a blood clot which plugs up a blood...

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C. Blood Clotting To repair damaged tissues Platelets - come from stem cells in the marrow called Megakaryocl'tes trillions flow through the vessels When there is a cut, abrasion, or scrape the torn vessel creates a rough surface. When platelets strike this surface they brake apart and thromboplastin is released: \ \ca \ prothrombin - " (plasma protein, liver) fibrinosen (plasma protein) v ', ithrorlbin (enzyme) fibrin threads I + clot (network) Physiological The fibrin threads form a network to trap RBCs and platelets. This results in the formation of a clot (a solid mass of blood). Eventually, the clot contracts, hardens and forms a scab. New cells arrive and plasmin dissolves the clot.
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Unformatted text preview: Thrornbus: a blood clot which plugs up a blood vessel Embolus: formed when a blood clot dislodges from a vessel and begins traveling through the blood stream looking for a vital organ to lodge itself, Factors Preventins Blood CIot Formation: 1. Smooth inner walls of uninjured vessels prevent platelets from rupturing and releasing their clotting enzymes. 2. Antlcoagulants and other substances in the blood prevent clot formation (i.e. heparin). Vitamin K deficiency (diet) prevents the formation of prothrombin. Hemophiliacs lack a clotting factor and bleed excessively fiom minor cuts. f;.'*-l '^ >4...
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