The Digestive System

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MOUTH

Food is moistened with saliva from the salivary glands. The salivary glands produce amylase enzyme in the saliva which breaks down starch. As the food is chewed a bolus is formed before being swallowed.

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OESOPHAGUS

A tube that takes food from the mouth to the stomach. Its lined with muscles that contract to help move the bolus along the oesophagus. This is called peristalsis. 

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LIVER

This is where BILE is produced. The role of BILE is to neutralise the stomach acid and emulsifie fats.

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GALL BLADDER

This is where BILE is stored, before it is released into the small intestine.

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STOMACH

It produces the PROTEASE enzyme, PEPSIN. It also produces hydrochloric acid to kill abcteria and to give the right pH for the protease enzyme to work. (pH 2 - acidic) 

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PANCREAS

Produces protease, amylase and lipase enzyme. This is released into the small intestine.

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SMALL INTESTINE

It produces protease, amylase and lipase enzymes to complete digestion. This is where food is absorbed out of the digestive system into the body.

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LARGE INTESTINE

Where excess water is absorbed from the food.

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