Gastric rugae

Gastric folds
Stomach
Details
Identifiers
Latin	plicae gastricae
TA	A05.5.01.028
FMA	75653
Anatomical terminology []

The gastric folds (or gastric rugae) may be seen during esophagogastroduodenoscopy or in radiological studies. They provide the stomach with increased surface area for nutrient absorption. When food enters the stomach, these folds stretch outward. This allows the stomach to expand, therefore increasing the volume of the stomach without increasing pressure.

...
Wikipedia