digestive system irene, paula b. and sanaya
TRANSCRIPT
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DIGESTIVE SYSTEM.
BY SANAYA, PAULA AND IRENE.
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WHAT DOES IT DO?
It extracts the nutrients from the food.
NUTRIENTS
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WHAT DOES IT DO?
It expels the waste products that our body doesn’t need.
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1st STEP
In the mouth, the teeth chew the food. The salivary glands produce saliva and saliva mixes with food and makes a bolus.
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2nd STEP
Then, the bolus goes to a small tube called oesophagus.
OESOPHAGUS
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3rd STEP
Next, the bolus reaches the stomach.
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4th STEP
After that, the gastric juices break down the bolus and transform it into a thick liquid.
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5th STEP
The gastric juices also kill dangerous bacteria.
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6th STEP
The bile produced by the liver and the pantreatic juices produced by the pancreas are mixed with the thick liquid.
Pancreas
Liver
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7th STEP
Then, this mixture goes to the small intestine, where the blood vessels absorb the nutrients.
Small Intestine
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8th STEP
The circulatory system carries the nutrients to all parts of our body.
nutrients
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9th STEP
Next, the large intestine stores de waste products that we don’t need and it absorbs water.
Waste Products
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10th STEP
Finally, faeces are expeled from the body.
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