Here's a breakdown:
* Rugae: These are the folds in the lining of the stomach. They allow the stomach to expand and contract as it fills and empties.
* Gastric glands: These are microscopic glands located in the spaces between the rugae. They are responsible for producing gastric juice, which contains:
* Hydrochloric acid (HCl): This acid helps break down food and kill bacteria.
* Pepsin: This enzyme breaks down proteins.
* Mucus: This protects the stomach lining from the corrosive effects of HCl.
So, the rugae provide the surface area for these gastric glands to be present and secrete the essential components of gastric juice.
