The products of digestion are used to build new carbohydrates, lipids, and what else?

The products of digestion are used to build new carbohydrates, lipids, and proteins.

Here's a step-by-step breakdown:

1. Digestion begins in the mouth where food is broken down into smaller pieces by chewing and mixed with saliva, which begins the process of breaking down carbohydrates.

2. The food then travels down the esophagus and into the stomach, where it is mixed with stomach acid to break down proteins.

3. The partially digested food then moves into the small intestine, where it is broken down further by enzymes produced by the pancreas and the walls of the intestine. These enzymes break down proteins into amino acids, fats into fatty acids and glycerol, and carbohydrates into simple sugars.

4. These smaller molecules (amino acids, fatty acids, glycerol, and simple sugars) are then absorbed through the walls of the small intestine and into the bloodstream.

5. Once in the bloodstream, these molecules can be transported to cells throughout the body where they can be used to build new carbohydrates, lipids, and proteins.

So, in summary, the products of digestion are used to build new carbohydrates, lipids, and proteins.