Digestion is defined and the seven nutrient groups are listed. The role of enzymes in digestion is also discussed.

First broadcast:
21 November 2008

Use the clip to inform students’ research into diet and its relationship with growth and development of different organisms. As well as considering the energy requirements of our bodies, the specific roles of fats, proteins and carbohydrates should be discussed. Divide the class into groups to research how a different nutrient is broken down in the digestive system and how the body absorbs and uses these products. The role of enzymes in digestion and other reactions in the body could be looked at in more detail.