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Reply	tbrucenyc says: Unanswered since 2010-11-13 07:55:55 So...  (no votes) Tags: humanbody.
	posted on 2011-04-18 13:44:34 | Report abuse

Reply	tbrucenyc says: Exposure of the blood to proteins such as tissue factor initiates changes to blood platelets and the plasma protein fibrinogen, a clotting factor. Platelets immediately form a plug at the site of injury; this is called primary hemostasis. Secondary hemostasis occurs simultaneously: Proteins in the blood plasma, called coagulation factors or clotting factors, respond in a complex cascade to form fibrin strands, which strengthen the platelet plug.[1] http://en.wikipedia.org/wiki/Clotting  (no votes) Tags: humanbody.
	posted on 2011-04-18 13:44:35 | Report abuse