Key learning points

1. The differences between mechanical and chemical digestion and where they take place.
2. Food is made up of carbohydrates, proteins and fats.
3. Carbohydrates, proteins and fats in food are broken down by digestion into smaller molecules that can be absorbed.
4. Enzymes are biological molecules that act as catalysts to speed up chemical digestion of carbohydrate, protein and fat.
5. Enzymes digest carbohydrates into sugars, proteins into amino acids, and fats into fatty acids and glycerol.

Keywords

• Digestion - Digestion is the process of breaking down large food molecules into smaller molecules that can be absorbed into the blood.

• Enzyme - An enzyme is a biological molecule that is a catalyst that speeds up the rate of a reaction.

• Carbohydrate - A carbohydrate is a molecule made of carbon, hydrogen and oxygen, and provides energy.

• Protein - A protein is a molecule made of amino acids, and is used for growth and repair.

• Fat - A fat is a molecule that is stored and used for energy.

Common misconception