Why must carbohydrates, fats, and proteins be broken down into small molecules during digestion?

Question

Quizplus · Accepted Answer

Carbohydrates, fats, and proteins need to be broken down into small molecules during digestion to facilitate their absorption by the walls of the intestines. The small molecules can easily pass through the intestinal walls into the bloodstream and be transported to cells throughout the body for use as energy or building blocks for various functions.

Why Must Carbohydrates, Fats, and Proteins Be Broken Down into Small