The esophagus is in the chest. It's about 10 inches long.

This organ is part of the digestive tract. Food moves from the mouth through the esophagus to the stomach.

The esophagus is a muscular tube. The wall of the esophagus has several layers:

• Inner layer or lining (mucosa): The lining of the esophagus is moist so that food can pass to the stomach.
  
  
• Submucosa: The glands in this layer make mucus. Mucus keeps the esophagus moist.
  
  
• Muscle layer: The muscles push the food down to the stomach.
  
  
• Outer layer: The outer layer covers the esophagus.

Glossary Terms

The organs through which food and liquids pass when they are swallowed, digested, and eliminated. These organs are the mouth, esophagus, stomach, small and large intestines, and rectum and anus.

The moist, inner lining of some organs and body cavities (such as the nose, mouth, lungs, and stomach). Glands in the mucosa make mucus (a thick, slippery fluid). Also called mucous membrane.

A thick, slippery fluid made by the membranes that line certain organs of the body, including the nose, mouth, throat, and vagina.

The layer of tissue under the mucosa (inner lining of some organs and body cavities that makes mucus).