Chemical digestion refers to the process by which enzymes breaking down biomolecules into smaller units. These enzymes are secreted in the digestive tract.
- In chemical digestion, nutrient molecules are absorbed primarily in the small intestine and delivered to the BLOODSTREAM where they can be circulated to other cells in the body.
- Chemical digestion is able to degrade macronutrients into monomeric subunits by breaking down their chemical bonds.
- For example, lactose is a disaccharide that is degraded by chemical digestion into two monosaccharides (i.e., glucose and galactose) by the action of an enzyme called lactase.
- Subsequently, small nutrients can be absorbed into the bloodstream from the small intestine, thereby these nutrients are transported to all of the cells of the body through the blood vessels.
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