How are nutrients are absorbed?

Nutrients are absorbed primarily in the small intestine after digestion breaks them down into smaller components. Carbohydrates are converted into simple sugars, proteins into amino acids, and fats into fatty acids and glycerol. These nutrients pass through the intestinal lining into the bloodstream via diffusion, facilitated diffusion, or active transport. Once in the bloodstream, they are transported to various cells and tissues in the body for use or storage.