Human Nutrition

Key Definitions

• Digestion: The breakdown of large food molecules into smaller molecules that can be absorbed by the body.
• Enzymes: Biological catalysts that speed up chemical reactions in the body.

Digestive System Organs

• Mouth, esophagus, stomach, small intestine, large intestine, rectum, anus.

Digestive Process

• Mechanical digestion: Physical breakdown of food by chewing and churning.
• Chemical digestion: Enzymes breaking down food molecules.

Exam Tips

• Understand the role of each organ in the digestive system.
• Know the types of digestive enzymes and where they are produced.