Mechanical and Chemical Digestion: A Guide to the Digestive Tract

Mechanical digestion:

- Oral cavity (chewing)

- Stomach (churning and grinding)

- Small intestine (segmentation and peristalsis)

Chemical digestion:

- Oral cavity (enzymatic action of salivary amylase on carbohydrates)

- Stomach (enzymatic action of pepsin on proteins in acidic environment)

- Small intestine (enzymatic action of various enzymes, including pancreatic enzymes and intestinal enzymes, on carbohydrates, proteins, fats, and nucleic acids)