Why does your stomach have folds in its walls?

Answer 1

Inside the small intestine thair are lots of hair like things that help with digestion. Now if you get a peice of paper (recycle after please) and fold it so that it ends up as a strip. now if you look it from above the size of the paper has shrunk. the small intestines use the same idea so the can fit more hairs into a smaller area

Answer 2

It increases surface area for increased secretion and absorption. And they are called rugae.

Answer 3

maybe beause its too long to fit in so it needs fold and by the way it is 9 meters long hope this helped u and youre thik brain =:)