Esophagus

Definition

The esophagus is a muscular tube connecting the throat (pharynx) with the stomach. It plays a crucial role in transporting food and liquids from the mouth to the stomach for digestion.

5 Must Know Facts For Your Next Test

1. The esophagus is approximately 25 cm long in adults.
2. It uses rhythmic contractions called peristalsis to move food towards the stomach.
3. The lower esophageal sphincter (LES) controls the passage of food into the stomach and prevents acid reflux.
4. The mucosa lining of the esophagus protects it from abrasion by ingested materials.
5. Swallowing involves both voluntary and involuntary muscle actions coordinated by the nervous system.

Review Questions

• What mechanism does the esophagus use to transport food to the stomach?
• How does the lower esophageal sphincter (LES) contribute to digestive health?
• What are the primary functions of the mucosa lining in the esophagus?

Related terms

Stomach:

A muscular organ that continues digestion after food passes through the esophagus.

Peristalsis:

Involuntary constriction and relaxation of muscles, creating wave-like movements that push contents through canals like the esophagus.

Lower Esophageal Sphincter (LES): A ring-like muscle at the junction between esophagus and stomach that regulates passage of food and prevents acid reflux.