Determines the number of red blood cells in a microliter of blood.
Normal ranges vary according to age and sex.
Normal is 82 to 99 femtoliters . White Blood Cell Count Measures the number of white blood cells in a microliter of blood. Normal values can be altered by exercise, stress, and disease. Normal values range from 3,700 to 10,500. White Blood Cell Differential Determines the percentage of each type of white blood cell .