What is primarily absorbed in the small intestine?

The primary function of the small intestine is the absorption of nutrients and minerals found in food. Digested nutrients pass into the blood vessels in the wall of the intestine through a process of diffusion. The inner wall, or mucosa, of the small intestine is lined with simple columnar epithelial tissue.

Also asked, where are amino acids absorbed into the bloodstream?

In the stomach, proteins are broken down into peptides, which are then broken down into single amino acids that are absorbed in the bloodstream though the small intestine.

How are proteins absorbed in the small intestine?

Pepsin is an enzyme in the stomach that breaks down the peptide bonds in protein. Enzymes continue to break down polypeptides and peptides into amino acids. Because amino acids are very small, they are able to be absorbed through the small intestine lining and into your bloodstream.

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