Blood Clotting:

The process of blood clotting has several stages:

1- Blood platelets are ruptured by the injury.

2- They release thromboplastin.

3- Thromboplastin turns prothrombin in thrombin.

4- Thrombin converts the liquid fibrinogen in solid fibrin fibres which create a web at the wound.

5. The blood cells caught in the web form a layer which slowly dries and creates a solid cloth that stops blood flow.

6. In a while a yellow liquid will come out of the clot’s periphery.