Question

There are an average of __________ WBCs per cubic millimeter of whole blood?

a) 100-1000
b) 4,000-11,000
c) 10,000-20,000
d) 50,000-100,000

Answer 1

The average range of white blood cells (WBCs) per cubic millimeter of whole blood is 4,000 to 11,000. These cells are key components of the body's immune system, existing in lower amounts than red blood cells.

Step-by-step explanation:

There are an average of 4,000 to 11,000 white blood cells (WBCs) per cubic millimeter (mm³) of whole blood in healthy individuals. White blood cells, or leukocytes, are crucial components of the immune system, which defend the body against infections and foreign invaders.

They are present at much lower quantities than red blood cells, with healthy levels typically within the range specified. The five types of WBCs are neutrophils, eosinophils, basophils, lymphocytes, and monocytes, each with specific functions in immune response.