Question

Platelets help in clotting of blood at injured site.Draw a flow diagram of this process.​

Answer 1

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Here is your answer,

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In hemostasis, platelets and a protein called fibrin work together to plug a damaged blood vessel wall.

This stops the bleeding and gives the body the chance to repair the damage.

When damage occurs in the endothelium, which is the lining of a blood vessel, platelets immediately form a plug at the site of the injury.

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Answer 2

Clotting of blood

Explanation:

• The injured cells and the platelets disintegrate at the site of the wound and release thrombokinase or thromboplastin
• Thrombokinase with the help of calcium ions converts prothrombin of the plasma into thrombin
• Thrombin in the presence of calcium ions reacts with the soluble fibrinogen and converts it into insoluble fibrin. Fibrin is a solid substance which forms threads and a meshwork at the site of the wound
• Blood cells are trapped in the network of the fibrin. The blood shrinks and squeezes out the rest of the plasma in the form of a clear liquid. The solid mass which is left behind is called a clot or thrombus