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Question
Differentiate between:
Red blood cells and White blood cells
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Solution
| Red blood cells | White blood cells. |
| These are minute biconcave disc like structures, flat in centre, thick and round at the periphery and nuclei are absent in mature RBCs. | These collect blood from different organs of the body. |
| These contain a respiratory pigment haemoglobin. | Haemoglobin is not present. |
| RBCs help in the transport of oxygen and CO2. | WBCs help in the protection of the body against infections from the germs. |
| The number of RBCs in an adult male is 5 million per cu. millimeter. | Their number is usually about 4000-8000 per cubic millimeter. |
| Their average life span is about 120 days. | Their average life span is about two weeks. |
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