How do mechanical digestion and chemical digestion affect food differently?

Mechanical digestion involves the physical breakdown of food into smaller pieces, which increases the surface area for enzymes to act upon. This process begins in the mouth with chewing and continues in the stomach with churning. In contrast, chemical digestion involves enzymatic reactions that break down food at the molecular level into nutrients the body can absorb. While mechanical digestion prepares food for enzymatic action, chemical digestion transforms food into usable components for energy and growth.