Question
RBCs and WBCs:
| RBCs | WBCs |
| 1. RBCs are red in colour due to haemoglobin present in them. | 1. WBCs are colourless as there is no pigment in them. |
| 2. RBCs are produced in red bone marrow. | 2. WBCs are produced mostly in bone marrow. But they are also produced in lymph nodes, spleen, etc. |
| 3. RBCs are smaller in size and rounded in .shape. | 3. WBCs are larger in size and are of different shapes. |
| 4. RBCs have an average lifespan of 120 days. | 4. Life span of WBCs vary according to their role. They have a life span from a few days to 3 weeks. |
| 5. Normal RBC count is 50 – 60 lakh RBCs per cubic mm. of blood. | 5. Normal WBC count is 5 thousands to 10 thousands per cubic mm. of blood. |
| 6. Their function is to transport the respiratory gases (Oxygen and Carbon Dioxide). | 6. Their main function is to produce antibodies and fight against the infections. Thus they are called soldiers of the body. |
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