WAEC Biology 2024 Papers

Digestion in mammals breaks down food into nutrients that the body uses for energy, growth, and repair.

How digestion works

1. Ingestion: Food is taken in.
2. Mastication: Food is chewed and mixed with saliva.
3. Secretion: Digestive juices are released into the digestive tract.
4. Digestion: Food is broken down into smaller molecules.
5. Absorption: Nutrients, water, vitamins, and electrolytes are absorbed into the bloodstream.
6. Evacuation: Waste products are eliminated.