Hemophilia
Definition
Hemophilia (pronounced hee-muh-FIH-lee-uh) is a genetic disorder that often results in excessive bleeding. The condition can range from mild to severe. In its most serious forms, it can lead to death.
Description
Injury to a blood vessel is a serious problem for the body. Blood may begin to leak out of the injured area. The body has developed a mechanism for protecting itself from this kind of damage. The mechanism involves the formation of a blood clot over the injured area to prevent loss of blood.
Blood clotting is a very complicated process. It involves blood cells known as platelets and at least twenty different chemical compounds. The first step in the clotting process is the formation of a temporary plug. The plug is formed of platelets that stick to the damaged area. The plug is soon covered by a more permanent structure consisting of fibrin (pronounced FI-brin). Fibrin is tissue that acts like a permanent patch or bandage on the injured area.
The production of fibrin takes place in a series of steps that requires thirteen different chemicals. These chemicals are known as "clotting factors." In order for fibrin to form, all thirteen clotting factors must be present in the blood.
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