Proteins are broken down into ; carbohydrates into ; and fats (triglycerides) into . the smaller sized molecules allow for transport across the mucosal membrane.

Proteins are broken down into amino acids, carbohydrates into simple sugars and fats into simple fatty acids.

Explanation:

Digestion may be defined as the process of breakdown of biomolecules into simpler substances with the help of enzymes and digestive juices.

The process of breakdown of carbohydrates starts in the mouth with the help of enzyme salivary amylase. Carbohydrates are broken into simple sugars and later absorbed by the body. The absorption and digestion of proteins is completed into the small intestine.  Proteins are broken converted into amino acids after complete digestion. Lipase enzyme breaks down the fat into simple fatty acids and glycerol.