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1. Respiration. Replentish O2, remove H2O

2. Maintain pH balance of tissues and cells throughout body.

3. Bring nutrition to cells-- water, glucose, electrolytes.

4. Remove waste products from where they're produced and take them to liver or spleen for detoxification.

5. Deliver antibodies and immune cells to parts of body challenged by infectious agents.

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12y ago

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