Haemostasis and Blood Coagulation

 

Following injury to a blood vessel, three events follow:
	Vascular Spasm
		Immediately after a vessel is cut or ruptured, there is contraction of the vascular wall.
		This contraction results from both local nervous and myogenic reflexes.
		This spasm can last from a few minutes to even hours.
	Platelet plug
		If the rent in the vessel is small, it is usually just sealed by a platelet plug.
	Coagulation
		This involves a cascade of reactions ending in the polymerisation of fibrin that completes the sealing of the wound.