THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -Absorption of water occurs by osmosis. Water diffuses in response to an osmotic gradient established by the absorption of electrolytes. Sodium is actively absorbed in the colon by sodium channels. Potassium is either absorbed or secreted depending on the concentration in the lumen.

Detailed explanation-2: -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-3: -Small intestine. The walls of the small intestine absorb water and the digested nutrients into your bloodstream.

Detailed explanation-4: -The major substance absorbed in the large intestine is water. The large intestine mainly functions for absorbing water from the undigested food passed by the small intestine.