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Red blood cell
Wound in skin
Platelet gather StickyForms a temporary plugin leaking vessel
Produce Trombokinase
Trombokinase
Ion Calcium
Prothrombin
Need Vitamin D
ThrombinFibrinogen
Fibrin
Forms the threads of the clot
Later
Harden (scab)
Mechanism of blood clotting
Whenever an injury occurs a chain reaction is set off.
Wound in skin
Wound in skin
Platelets gather at a site of the injury and become sticky
Platelet
Forming a temporary plug in the leaking vesselForming a temporary plug in the leaking vessel
Wound in skin
Prothrombin (non-active enzyme) need ion Prothrombin (non-active enzyme) need ion calcium to convert into thrombin.calcium to convert into thrombin.
Trombokinase
Ion CalciumProthrombin
Vitamin K
Thrombin
Thrombin converts soluble fibrinogen Thrombin converts soluble fibrinogen (plasma protein formed by the liver) into (plasma protein formed by the liver) into
insoluble fibrin. Fibrin forms the threads of insoluble fibrin. Fibrin forms the threads of the clotthe clot
Thread of clot
A mesh-like network of A mesh-like network of fibrin traps red blood fibrin traps red blood
cells together, forming cells together, forming the blood clot, which later the blood clot, which later
hardens into a scab. hardens into a scab.