Is a nutrient absorbed in the bloodstream through mouth?

Nutrients are not absorbed into the bloodstream through the mouth. The mouth is the beginning of the digestive system, and its main function is to break down food into smaller pieces so that it can be more easily digested and absorbed. The absorption of nutrients takes place in the small intestine, where the walls of the intestine are lined with millions of tiny villi and microvilli that increase the surface area for absorption.