Describe the appearance of the iniside of the stomach how do the rugaw within the stomach aid in mechanical digestion?

The inside of the stomach features a mucosal lining with folds called rugae, which allow the stomach to expand when filled with food. These rugae increase the surface area and help facilitate mechanical digestion by aiding in the churning and mixing of food with gastric juices. This action breaks down food into smaller particles, promoting further digestion and nutrient absorption. The muscular contractions of the stomach wall, combined with the rugae, enhance the efficiency of the digestive process.