Specifically, the stomach lining contains cells called parietal cells which produce hydrochloric acid (HCl). This acid is a key component of gastric juice, which helps to:
* Break down food: HCl helps to denature proteins and activate digestive enzymes.
* Kill bacteria: The acidic environment of the stomach kills many harmful bacteria that are ingested with food.
* Activate pepsin: HCl converts inactive pepsinogen into the active enzyme pepsin, which is essential for protein digestion.
