Hemostasis or haemostasis (Greek: αιμόστασις aimóstasis, from αίμα aíma “blood” + στάσις stásis “stagnation”) is the process by which blood vessels are repaired after injury. This process starts from vascular contraction as an initial reaction to injury, then to clot formation, and finally removal of the clot when the repair to injury is done. It occurs in four stages.
