Blood Platelets

Platelets: Fundamental in the Coagulation Process

What are

Platelets, also known as thrombocytes, are anucleated cytoplasmic fragments present in the blood.


- Platelets have the main function of participating in the process of blood clotting, ie the formation of clots.

Main features of platelets:

- They have no core.

- They are derived from megakaryocyte cytoplasm fragments.

- They have the form of flat discs (when circulating in the blood).

- Measures between 1.5 and 3.0 micrometers in diameter (so can only be viewed on powerful microscopes).

- Have a life span of between 8 and 10 days. After that they are destroyed and removed from circulation by the spleen.

Did you know?

The increase in platelets in human blood is known as thrombocytosis.

- The decrease in the number of platelets in human blood is known as thrombocytopenia.

- The normal amount of platelets in human blood is between 150,000 and 400,000 per cubic millimeter of blood.