human stomach is also known as an churning machine. it involves 3 steps propulsion, grinding and retropulsion. when the chyme enters our stomach Hcl gas is been secreted.this results in burning in our stomach. the contraction of stomach muscles squeez and mix the food with the acids and juices of the stomach. some other food materials are also been broken down here this is the reason why stomach as an churning machine
My stomach was churning after eating that spicy Mexican food.
mechanical
small intestine
The churning action of the stomach wall accomplishes mechanical digestion. Mechanical digestion begins in the mouth and along with chemical digestion, ends in the small intestine.
My heart was churning like a tempest in a teacup. Who is churning your butter?
ACID
anus
the digestion movement in stomach like churning is called paristalses
The answer in a single word is chyme. There are gastric juices released in stomach. When food enters stomach, it starts churning(muscular contraction and relaxation). The food mixes with gastric juice to form a semi-solid acidic bulk known as chyme.
Intestines
Chyme is the name for the mixture formed by the churning and digestion of food in the stomach.
That would be the stomach.