ANATOMY

Detailed explanation-1: -The mucosa has glands that secrete mucus to keep the lining moist and well lubricated to ease the passage of food. Upper and lower esophageal sphincters control the movement of food into and out of the esophagus.

Detailed explanation-2: -The innermost lining of the esophagus, the mucosa remains moist to help food pass to the stomach. Submucosa. This layer contains glands which produce mucus that helps to keep the esophagus moist.

Detailed explanation-3: -The esophagus is about 8 inches long, and is lined by moist pink tissue called mucosa. The esophagus runs behind the windpipe (trachea) and heart, and in front of the spine.

Detailed explanation-4: -The mucus layer is the first line of defense against infiltration of microorganisms, digestive enzymes and acids, digested food particles, microbial by-products, and food-associated toxins.