ANATOMY

Detailed explanation-1: -Five layers constitute the stomach; mucosa, submucosa, muscularis, subserosa and serosa. Complete answer: > Rugae-When there is an empty stomach, the lining that is present is thrown up as folds. These are termed as the Rugae.

Detailed explanation-2: -The mucosal lining of the stomach forms countless wrinkles and folds, known as rugae when it is empty.

Detailed explanation-3: -Rugae. Inside the stomach are rugae, ridges that increase the surface area of the stomach and stretch out to increase stomach volume when the stomach is full.

Detailed explanation-4: -The rugae are folds in the stomach lining. Surface epithelial cells, specialized mucus cells of the neck, and mucus cells in the glands also secrete mucin, a high molecular weight glycoprotein.

Detailed explanation-5: -Function. A purpose of the gastric rugae is to allow for expansion of the stomach after the consumption of foods and liquids. This expansion increases the volume of the stomach to hold larger amounts of food. The folds also result in greater surface area, allowing the stomach to absorb nutrients more quickly.