PATHOLOGY

Detailed explanation-1: -Together, the submucosa supports the mucosal layer and has many folds analogous to that of an accordion called rugae which allows for distension of these layers when food enters the stomach.

Detailed explanation-2: -The Stomach Secretes HCl, Pepsinogen, Mucus, Gastric Lipase, and Intrinsic Factor. The lining of the stomach at rest is thrown into thick, velvety folds called rugae. These contain microscopic invaginations, called gastric pits, that each open into four or five gastric glands.

Detailed explanation-3: -The gastric folds (or gastric rugae) are coiled sections of tissue that exist in the mucosal and submucosal layers of the stomach.