In which organ is water primarily reabsorbed?

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Multiple Choice

In which organ is water primarily reabsorbed?

Explanation:
Water reabsorption hinges on solute uptake creating an osmotic pull for water across the lining. The small intestine has an enormous absorptive surface due to its villi and microvilli and a wide array of transporters, so it reclaiming the bulk of luminal water as chyme passes through. The large intestine does reabsorb water as well, mainly to concentrate stool, but it handles far less volume overall. The mouth and stomach contribute only small amounts of water absorption. So the primary site of water reabsorption is the small intestine.

Water reabsorption hinges on solute uptake creating an osmotic pull for water across the lining. The small intestine has an enormous absorptive surface due to its villi and microvilli and a wide array of transporters, so it reclaiming the bulk of luminal water as chyme passes through. The large intestine does reabsorb water as well, mainly to concentrate stool, but it handles far less volume overall. The mouth and stomach contribute only small amounts of water absorption. So the primary site of water reabsorption is the small intestine.

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