They grind and digest food.
The function of the rugae on the stomach wall is to aid in digestion. This smooth's out as the stomach is filled with food.
The purpose is to allow the stomach to expand.
The folds of the stomach are called rugae.
Rugae
These types of folds are called rugae, in the stomach they are the gastric rugae
The folds of the stomach are called rugae. These folds are expandable, allowing the stomach to enlarge when filled with food and drink. When the stomach empties again, the rugae will fold, decreasing the volume of the stomach back to its original size.
Folds in the stomach increase the surface area of the mucosa. So you can have more of secreations available for digestion of food.
Gastric folds are found in the interior of the stomach. They are also know as gastric rugae.The main importance of gastric folds is to increase the stomach's surface area and allow it to expand.
The folds that form in the gastric mucosa when the stomach is empty are called rugae. These are temporary folds that allow for expansion of the stomach when food is consumed. Rugae help to increase the surface area of the stomach lining for better absorption of nutrients.
Rugal folds allow the stomach to be flexible while keeping it strong so that it will not rupture, although if someone eats enough food, it is in fact possible to cause the stomach to break, a very undesirable state of affairs.
rugae
rugae