| Term 
 | Definition 
 
        | drugs that block or inhibit any step of the coagulation process, preventing or slowing clot formation. |  | 
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        | Term 
 | Definition 
 
        | drugs that interfere with the aggregation or clumping of platelets to form the platelet plug. |  | 
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        | Term 
 | Definition 
 
        | substances formed in the liver – many requiring vitamin K – that react in a cascading sequence to cause the formation of thrombin from prothrombin;  thrombin then breaks down fibrin threads from fibrinogen to form a clot.formation of thrombin from prothrombin;  thrombin then breaks down fibrin threads from fibrinogen to substances formed in the liver – many requiring vitamin K – that react in a cascading sequence to cause the formation of thrombin from prothrombin;  thrombin then breaks down fibrin threads from fibrinogen to form a clot. |  | 
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        | Term 
 | Definition 
 
        | cascade of clotting factors in blood that has escaped the vascular system to form a bclot on the outside of the injured vessel. |  | 
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        | Term 
 | Definition 
 
        | cascade of clotting factors leading to the formation of a clot within an injured vessel. |  | 
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        | Term 
 | Definition 
 
        | property of platelets to adhere to an injured surface and then attract other platelets, which clump together or aggregate at the area, plugging up an injury to the vascular system. |  | 
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        | Term 
 | Definition 
 
        | drugs that lyse, or break down, a clot that has formed; these drugs activate the plasminogen mechanism to dissolve fibrin threads. |  | 
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        | Term 
 | Definition 
 
        | disorder involving too few red blood cells (RBCs) or ineffective RBCs that can alter the bloods’s ability to carry oxygen. |  | 
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        | Term 
 | Definition 
 
        | type of megaloblastic anemia characterized by lack of vitamin B12 secondary to low production of intrinsic factor by gastric cells;  vitamin B12 must be replaced by intramuscular injection or nasal spray because it cannot be absorbed through the gastrointestinal tract |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | anemia caused by lack of vitamin B12 and/or folic acid, in which RBCs are fewer in number and have a weak stroma and a short lifespan; treated by replacement of folic acid and vitamin B12. |  | 
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        | Term 
 | Definition 
 
        | low RBC count with low iron available because of high demand, poor diet, or poor absorption; treated with iron replacement. |  | 
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        | Term 
 | Definition 
 
        | RBC that has lost its nucleus and entered circulation just recently, not yet fully matured. |  | 
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        | Term 
 
        | Colony stimulating factors |  | Definition 
 
        | are drugs that promote the production of various blood cells. |  | 
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