ANATOMY

Detailed explanation-1: -Absorption of ingested water and most solutes occurs in the proximal small intestine, therefore the rate at which beverages are emptied from the stomach is an important factor in determining the rate of water absorption.

Detailed explanation-2: -Most water absorption takes place in the distal third of the small intestine, but the bulk of intestinal water is absorbed by the large intestine. However, Na+ and water absorption in the small intestine is important in absorption of nutrients and other ions.

Detailed explanation-3: -Small intestine. The walls of the small intestine absorb water and the digested nutrients into your bloodstream.

Detailed explanation-4: -The ileum is the last and longest section of the small intestine. Here the walls of the small intestine begin to thin and narrow, and blood supply is reduced. Food spends the most time in the ileum, where the most water and nutrients are absorbed.