AP BIOLOGY

Detailed explanation-1: -The large intestine absorbs water and changes the waste from liquid into stool.

Detailed explanation-2: -The large intestine is much broader than the small intestine and takes a much straighter path through your belly, or abdomen. The purpose of the large intestine is to absorb water and salts from the material that has not been digested as food, and get rid of any waste products left over.

Detailed explanation-3: -Water is absorbed by the large intestine by osmosis, with diffusion occurring in accordance with the osmotic gradient. Sodium is absorbed by the sodium/potassium pump in the colon, which diffuses potassium and sodium in opposite directions due to the formation of concentration gradients.

Detailed explanation-4: -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-5: -With a length of 1.5 meters the primary function of the large intestine is absorption of water and electrolytes from digestive residues (a process that usually takes 24 to 30 hours). The wrenching action to separate the undigested food and the water contained in it begins in the ascending part of the colon .