• blood cells
  • Some types of anemia are named for the factors causing them: poor diet ( nutritional anemia ), excessive blood loss ( hemorrhagic anemia ), congenital defects of hemoglobin ( hypochromic anemia ), exposure to industrial poisons, diseases of the bone marrow ( aplastic anemia and hypoplastic anemia ), or any other disorder that upsets the balance between blood loss through bleeding or destruction of blood cells and production of blood cells. (thefreedictionary.com)
  • The color of red blood cells is due to the heme group of hemoglobin. (wikipedia.org)