ANATOMY

Detailed explanation-1: -Amylase, maltase, and lactase in the mouth digest carbohydrates. Trypsin and lipase in the stomach digest protein. Bile emulsifies lipids in the small intestine. No food is absorbed until the small intestine.

Detailed explanation-2: -The esophagus contracts as it moves food into the stomach. A “valve” called the lower esophageal sphincter (LES) is located just before the opening to the stomach. This valve opens to let food pass into the stomach from the esophagus and it prevents food from moving back up into the esophagus from the stomach.

Detailed explanation-3: -The esophagus is the hollow, muscular tube that passes food and liquid from your throat to your stomach.

Detailed explanation-4: -The esophagus is only a passage way for the food and drink ingested. Digestion starts in the mouth where the teeth breaks down the food and the saliva lubricates the food so it won’t obstruct the esophagus when it goes to the stomach.