How to absorb nutrients in the stomach

The

stomach is responsible for absorbing water, inorganic salts, monosaccharides and some fat-soluble substances. In addition, some polypeptide hormones can also be absorbed in the stomach. The small intestine is the main organ for absorbing nutrients. It has villi structure, which can increase the surface area and absorb nutrients more effectively. After food enters the small intestine, nutrients are further decomposed and absorbed. In addition to direct absorption, the stomach also participates in the absorption of nutrients indirectly. For example, when protein in food enters the stomach, gastric acid breaks down protein into amino acids, which are then absorbed in the small intestine. The stomach also releases endogenous factors that help vitamin B12 be absorbed in the small intestine.