describe the mechanism of blood clotting..?
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our blood contains platelets....when bleeding starts from any wound then these platelets stops the blood from coming out and help in the clotting of blood
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Blood normally remains in its liquid state while it is within blood vessels but when it leaves them the blood may thicken and form a gel (coagulation). Blood clotting is the process by which (liquid) blood is transformed into a solid state. The mechanism of blood clotting is a complex process involving many clotting factors (incl. calcium ions, enzymes, platelets, damaged tissues) activating each other.
Following damage to a blood vessel, vascular spasm occurs to reduce blood loss while other mechanisms also take effect: Blood platelets congregate at the site of damage and amass to form a platelet plug. This is the beginning of the process of the blood "breaking down" from its usual liquid form in such a way that its constituents play their own parts in processes to minimise blood loss.
Following damage to a blood vessel, vascular spasm occurs to reduce blood loss while other mechanisms also take effect: Blood platelets congregate at the site of damage and amass to form a platelet plug. This is the beginning of the process of the blood "breaking down" from its usual liquid form in such a way that its constituents play their own parts in processes to minimise blood loss.
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