Food on the plate must be converted into a mashed-up, gooey liquid for the digestive system to be able to split it up into its constituent parts: proteins, carbohydrates, fats, vitamins ...

Food that cannot be broken down is released from the body as faeces (poo). The digestive system is made up of key parts, each of which has a different function. Food passes through most of these ...

Narrator: Why do we eat food? I mean, really, wouldn't life be far simpler if we didn't have to? Well the thing is we need energy to keep on living. Each part of our body needs to be recharged ...