The digestive system is the series of tubelike organs that convert our meals into body fuel. There are about ... to split it up into its constituent parts: proteins, carbohydrates, fats, vitamins ...

What are the parts ... human body and what they do. How do humans digest food? From chewing to pooing. Learn how our bodies get what they need from food. Bitesize 1st Level Science guide on the ...

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 ...