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Digestive system The main part of the digestive system is the digestive tract. This is like a long tube, some nine metres in total, through the middle of the body. It starts at the mouth, where food and drink enter the body, and finishes at the anus, where leftover food and wastes leave the body Mouth Teeth bite off and chew food into a soft pulp that is easy to swallow. Chewing mixes the food with watery saliva, from 6 salivary glands around the mouth and face, to make it moist and slippery. Oesophagus The oesophagus, or gullet, is a muscular tube. It takes food from the throat and pushes it down through the neck, and into the stomach. It moves food by waves of muscle contraction called peristalsis. Stomach The stomach has thick muscles in its wall. These contract to mash the food into a sloppy soup. Also the stomach lining produces strong digestive juices. These...

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