Answer :
The following describes the stomach's structure: Your stomach's interior lining is called mucosa. Small ridges can be seen in the mucosa of an empty stomach.
The ridges and mucosa flatten and enlarge when your stomach is full. The submucosa is made up of nerve cells, lymphatic vessels, connective tissue, and blood and blood vessels. The mucosa is encased and safeguarded by it.
The main stomach muscle is called the muscularis externa. In order to digest food, its three layers contract and relax. Your stomach's serosa is a layer of membrane. The GI tract's different components each aid in the digestion and passage of food and liquids through the body. Your body absorbs nutrients and water when you're digesting food. Then, through your large  intestine, you eliminate the leftovers of digestion.
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