What is the mechenical digestion in the stomach?
There are three muscular layers within the stomach (longitudinal, transverse and oblique) that act to turn over and mix the food.
Although the stomach is responsible for digestion, very little absorption happens in it. Instead, the stomach is more like a washing machine; it agitates foodstuffs. It stirs up ground up food (mechanical digestion from teeth / gums occurs in the mouth), with stomach acids in the stomach and bile salts from the gallbladder assisting in chemical digestion.