Here we have Compared difference between RBC and WBC
| RBCs | WBCs |
| Number. The number is 4.5-5.0 million/ml of blood. | The number is 5000-8000/ml of blood. |
| Types. All the RBCs are of one type. | WBCs are of five types. |
| Size. The size is about 7 um. | The size is 8-15 um. |
| Form. RBCs are biconcave and circular. | They are rounded to irregular in shape. |
| Nucleus. A nucleus is absent, i.e., RBCs are enucleate. | WBCs are nucleated. |
| Cell Organelles. Most of the cell organelles degenerate during development. | They retain all the cell organelles. |
| Haemoglobin. It is present. | It is absent. |
| Function. They take part in transportation of most of oxygen and smaller quantities of carbon dioxide. | They take part in phagocytosis of germs, dead cells and formation of antibodies. |