Food gives the body the nutrients and energy it needs. The job of the digestive system is to break food down into simple substances the body can use. These are then absorbed into the bloodstream, while any indigestible waste is removed.
The main part of the digestive system is a long tube, called the digestive tract. It starts in the mouth, travels down the oesophagus to the stomach, then runs through the small and large intestines to the anus. Other organs also play a role in digestion: these are the teeth, tongue, salivary glands, liver, pancreas, and gallbladder.
Digestion is important because your body needs nutrients from food and drink to work properly and stay healthy. Proteins, fats, carbohydrates, vitamins, minerals and water are nutrients. Your digestive system breaks nutrients into parts small enough for your body to absorb and use for energy, growth, and cell repair.
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