Iron-deficiency anemia occurs because of a lack of the mineral iron in the body. Bone marrow in the center of the bone needs iron to make hemoglobin, the part of the red blood cell that transports oxygen to the body's organs. Without adequate iron, the body cannot produce enough hemoglobin for red blood cells.
(Ä­n-fÃ»râ²mÄ­-tÄ) n. pl. inÂ·firÂ·miÂ·ties. 1. a. The condition of being infirm, often as associated with old age; weakness or frailty: the infirmity brought on by the disease. b. A bodily ailment or weakness: complained about his infirmities.
1. a physical weakness or ailment: the infirmities of age. 2. the quality or state of being infirm; lack of strength. 3. a moral weakness or failing. [1325â75; Middle English < Latin]