The indicated structures that ""wrinkle"" the inside wall of the stomach are rugae.
Rugae, which are wrinkles, cover the whole inner layer of the stomach (or gastric folds). Rugae both aid to grasp and move food during digestion and allow the stomach to expand to accommodate huge meals.
The rugae have the purpose of allowing the stomach or other tissues to expand as necessary. The rugae are creases in the tissue of an empty stomach. But as the stomach grows fuller, the rugae spread out. They have the capacity to regulate when and what goes in and out of the stomach.
Therefore, the indicated structures that ""wrinkle"" the inside wall of the stomach are rugae.
To learn more about wrinkle here
https://brainly.com/question/1206511
#SPJ1
