Hematocrit (How much of your blood is made of red blood cells).Platelets (To help your body clot and stop bleeding).White blood cells (That help fight infections) – A CBC with differential helps measure the number of each of the five types of white blood cells.Red blood cells (That help carry oxygen from lungs to body parts).Also Known As Complete Blood Count, CBC Blood Test, Hemogram What is a Complete Blood Count (CBC) (includes CBC Differential and Platelets) Test?Ī complete blood count or CBC blood test measures different features and parts of your blood, including the following: