Digestive system

Sophie Koch
Mind Map by Sophie Koch, updated more than 1 year ago
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Digestive system
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Digestive system
1 1) Mouth
1.1 Food is moistened with saliva from the salivary gland.
1.1.1 The salivary glands produce amylase enzyme in the saliva, which breaks down starch.
1.1.1.1 Food is chewed to form a ball (bolus) before being swallowed.
2 2) Oesophagus
2.1 This tube takes food from the mouth to the stomach.
2.1.1 Its lined with muscles that contract to help the bolus move along, by peristalsis (Muscles contract in waves to squeeze food down towards the stomach)
3 3) Stomach
3.1 It pummels the food with its muscular walls.
3.1.1 It produces the protease enzyme, pepsin.
3.1.1.1 It produces hydrochloric acid for 2 reasons: To kill bacteria and to give the right pH for the protease enzyme to work (pH 2 -acidic).
4 4) Small intestine
4.1 Produces protease, amylase and lipase enzymes to complete digestion.
4.1.1 This is also where 'food' is absorbed out of the digestive system into the body.
5 5) Large intestine
5.1 Excess water is absorbed from the food. Leaving waste material behind.
6 6) Pacreas
6.1 Produces protease, amylase and lipase enzymes. It releases these into the small intestine.
7 7) Liver
7.1 Also where bile is produced. Bile neutralises stomach acid and emulsifies (digest) fats.
7.1.1 Absorbed nutrient are transported here and are processed.
8 8) Gull bladder
8.1 Where bile is stored, before it's released into the small intestine.
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