💀anatomy and physiology i review

Mucosal barrier

Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025

Definition

The mucosal barrier is a protective layer that lines the stomach, preventing the acidic gastric juices from damaging the stomach walls. It consists of mucus, bicarbonate ions, and epithelial cells that work together to prevent ulceration.