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Anemia means less number of erythrocytes or red blood cells in blood. qualitative or quantitative deficiency of hemoglobin, a molecule found inside red blood cells (RBCs). Since hemoglobin normally carries oxygen from the lungs to the tissues, anemia leads to hypoxia (lack of oxygen) in organs. Since all human cells depend on oxygen for survival, varying degrees of anemia can have a wide range of clinical consequences. Anemia is also caused by a lack of iron in the body. The three main classes of anemia include excessive blood loss (acutely such as a hemorrhage or chronically through low-volume loss), excessive blood cell destruction (hemolysis) or deficient red blood cell production (ineffective hematopoiesis). Anemia is the most common disorder of the blood. There are several kinds of anemia, produced by a variety of underlying causes. Anemia can be classified in a variety of ways, based on the morphology of RBCs, underlying etiologic mechanisms, and discernible clinical spe...

Our bright red blood contains seven types of cells, such as: I. Red blood cells. II. White blood cells or leukocytes. III. Thrombocytes or platelets (clotting cells). We will see importance of each type of cell one by one now. I. Red blood cells or Erythrocytes: These cells are made in the bone marrow (soft tissue in the center of certain bones) and are necessary to carry oxygen from the lungs through the blood to all body cells. The oxygen is then used up by body cells in the process of converting food to energy (catabolism). Hemoglobin (globin is a protein) is an important protein in erythrocytes that carries the oxygen through the bloodstream. II. White Blood Cells or Leukocytes: Leukocytes are of two types. a). Granulocytes b). Agranulocytes Granulocyes- Granulocytes-these cells containing dark-staining granules in their cytoplasm, and these cells are formed in bone marrow. They are further divided into three types of cells such as A). Eosinophils-these ce...