Question

Blood does not clot in blood vessels. What do you think? Give reasons in support of your answer.

Answer 1

Blood coagulation:

1. The process of formation of a clot in the blood is termed as blood coagulation.
2. Blood clotting occurs at the time of an injury or infection to prevent the loss of blood by stopping the blood flow.
3. Platelets or thrombocytes are responsible for blood coagulation.

Clotting in blood vessels:

1. The formation of a blood clot inside the blood vessels is called thrombosis.
2. The clot formed inside the blood vessels is known as a thrombus.
3. The clotting of blood inside the blood vessels or thrombosis does not commonly occur.

Reasons:

1. Presence of anticoagulants like heparin or antiprothrombins.
2. Presence of procoagulants in an inactive form.
3. Intact endothelium is present in blood vessels.