White blood cells are formed in the bone marrow from myeloid stem cells, some of which are formed in the lymph nodes from lymphoid stem cells.

White blood cells are the units that fight infection and disease.

Unpleasant

General phagocytosis: acute bacterial infections

Monocytes phagocytose large particles in typhoid and malaria

What is the main function of platelets?

What is the normal range for platelet count per mm3?

Where are platelets destroyed at the end of their lifespan?

What causes vasoconstriction in the process of stopping bleeding?

Which of the following increases the platelet count?

A normal platelet count is less than 100,000 per mm3.

Platelets play a role in clot formation.

Splenomegaly increases the number of platelets.

5HT contributes to vasoconstriction.