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Word Count: 391
Mouth Food starts its long journey at the mouth The mouth is the first part of the digestive system The food is broken up with the help from saliva Saliva contains an enzyme that breaks up the starch from food into smaller molecules An adult produces about a litre of saliva each day Oesophagus The oesophagus is the organ where bits of food swallowed are pushed down It connects the throat above with the stomach below At the intersection of the oesophagus and stomach there is a ring-like controlling device that closes the passage between the two organs However as the food approaches the closed ring the surrounding muscles relax and allow the food to pass It takes about 10 seconds to gulp down Stomach After going through the mouth and oesophagus food enters the stomach which has three mechanical tasks to do First the stomach must store the swallowed food and liquid This task requires the muscle of the upper part of the stomach to relax and take in large volumes of swallowed material Secondly the stomach has to mix up the food liquid and digestive juice produced by the stomach and will generate a very thick liquid By then the lower part of the stomach mixes these materials by its muscle action After mixing the materials in the stomach it then has to slowly empty its content into the small intestines The food in the stomach churns up an acid bath This process may take up six hours just digesting in the stomach depending on the size of the meal Small intestine Our small intestine is a coiled tube almost 7 metres long As food is digested into the small intestine it dissolves into more juices produced by the pancreas gall bladder intestines and stomach and it will get pushed down in our body It is all mixed and ready to be pushed down for further
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