A CBC measures the components of your blood. This includes:
• Red blood cells: Red blood cells transport oxygen throughout your body.
• White blood cells: Your body uses white blood cells to fight infection.
• Hemoglobin: Hemoglobin are proteins inside your red blood cells.
• Hematocrit: Hematocrit is the fluid, or plasma in your red blood cells.
• Platelets: Platelets are what allow your blood to clot.