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Question
Complete the following table:
| Components | Origin | Function | Approx. No. (mm3) | Life span |
| RBCs | ||||
| WBCs | ||||
| Platelets |
Solution
| Components | Origin | Function | Approx. No. (mm3) | Life span |
| RBCs | Bone marrow | Carry O2 to the different parts of the body | 4.8 million-5.5 million | 120 days |
| WBCs | Bone marrow | Develop immunity | 7,000 | Two weeks |
| Platelets | Large bone marrow cells | Initiate blood clotting | 250,000 | 2-3 days |
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