Stomach (non-ruminant)

Stomach differs from organisms to another one, even within mammals. There are ruminant animals, like caw, and non-ruminant animals, like human. Stomach in human is bean-like structure; and it is just a camper. Its can hold up to 6 liters. It receives food from esophagus. Its receiving of food is controlled by a muscle between them, which is cardiac sphincter. The main function of it is to digest carbohydrates and proteins. Its pH is around 2. Its pH is so lower because it dissociates the protein to can be absorbed. After digesting the food, food will be taken out from stomach into small intestine by pyloric sphincter.