WAEC - Biology (2024 - No. 24)
The process of food digestion in mammals would
make energy immediately available to the body
promote growth and repair of tissues
provide sufficient food materials within the body
render food substances soluble and absorbable
Explanation
Digestion in mammals breaks down food into nutrients that the body uses for energy, growth, and repair.
How digestion works
- Ingestion: Food is taken in.
- Mastication: Food is chewed and mixed with saliva.
- Secretion: Digestive juices are released into the digestive tract.
- Digestion: Food is broken down into smaller molecules.
- Absorption: Nutrients, water, vitamins, and electrolytes are absorbed into the bloodstream.
- Evacuation: Waste products are eliminated.
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