![]() Common causes of iron deficiency are excessive menstrual loss in women and bleeding peptic ulcer in men. ![]() Deficiency results if the dietary supplies of iron are insufficient to meet the needs if absorption is faulty, as in malabsorption disorders or if blood loss is occurring. In the male there is virtually no further need for iron. In the adult the body content is approximately 3.7 grams of iron, of which more than half is hemoglobin. Once in the body, it is retained and used over and over again, only minimal amounts being lost through shedding of cells from the skin and the exposed membranes and, in the female, through normal menstruation. Iron is derived from the diet and absorbed in the intestinal tract. Iron is required for hemoglobin formation if the supply is insufficient to produce normal quantities of hemoglobin, the bone marrow ultimately is forced to produce cells that are smaller than normal and poorly filled with hemoglobin. Iron deficiency is the most common cause of anemia throughout the world. The first is a result of a deficiency of iron, and the second is a result of impaired production of hemoglobin in either case there is an inadequate amount of the final product in the red cell. Hypochromic microcytic anemias, characterized by the presence in the circulating blood of red cells that are smaller than normal and poorly filled with hemoglobin, fall into two main categories. SpaceNext50 Britannica presents SpaceNext50, From the race to the Moon to space stewardship, we explore a wide range of subjects that feed our curiosity about space!. ![]() Learn about the major environmental problems facing our planet and what can be done about them!
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