AP BIOLOGY

Detailed explanation-1: -The large intestine is the last part of the gastrointestinal (GI) tract, the long, tube-like pathway that food travels through your digestive system. It follows from the small intestine and ends at the anal canal, where food waste leaves your body.

Detailed explanation-2: -Rectum: The final section of digestive tract measures from 1 to 1.6 inches (or 2.5 to 4 cm). Leftover waste collects there, expanding the rectum, until you go to the bathroom. At that time, it is ready to be emptied through your anus.

Detailed explanation-3: -The final stage of the digestive system is the colon (large intestine) which absorbs water and salts before the remains are passed out of the rectum as faeces.

Detailed explanation-4: -The lowest part of your small intestine is the ileum. This is where the final parts of digestive absorption take place.

Detailed explanation-5: -After you eat, it takes about six to eight hours for food to pass through your stomach and small intestine. Food then enters your large intestine (colon) for further digestion, absorption of water and, finally, elimination of undigested food. It takes about 36 hours for food to move through the entire colon.