Digestion

Definition

Digestion is the set of mechanical and chemical processes that transform food into nutrients absorbable by the body.

How it works

Digestion begins in the mouth with chewing and salivary amylase. The stomach grinds and acidifies food. The duodenum receives bile and pancreatic enzymes. The small intestine completes the breakdown and absorbs nutrients. The colon recovers water and minerals.

Role

Reducing food macromolecules into units assimilable by cells.

Examples

• Proteins → amino acids
• Carbohydrates → glucose
• Fats → fatty acids + glycerol

Recommendations

Eat slowly, chew well, and avoid stress during meals to optimize digestion.

Key takeaway

Digestion is a complex process that begins well before the stomach — chewing is fundamental.

Related terms