The calculated number of white or red blood cells in a cubic millimeter of blood.

A test to check the number of red blood cells, white blood cells, and platelets in a sample of blood. Also called complete blood count and CBC.
White blood cell (WBC) refers to a blood cell that does not contain hemoglobin. White blood cells include lymphocytes, neutrophils, eosinophils, macrophages, and mast cells. These cells are made by bone marrow and help the body fight infections and other diseases.
Red blood cell (RBC) is a cell that contain hemoglobin, carring oxygen to all parts of the body. Also called erythrocyte.