Low level of hemoglobin, hematocrit
, number of red blood cells is called anemia
, but many things can cause their levels to be decreased such as: bleeding, destruction of the red cells, low iron
, low productions of red cells by the bone marrow
, genetic defects, faulty hemoglobin molecules( sickle anemia), malignancy, renal disease.
Types: microcytic, macrocytic, normocytic, hemolityc.