1
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The digestive system. Here, in the mouth, the food is rocked up by the teeth and mixed with saliva by the tongue.

2
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Estepatitis. The food goes down from this to the stomach.

3
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Stomach. That's because it makes the food into a thick, small intestine.

4
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Here are a lot of blood vessels. Nutrients pass through the blood here.

5
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The large intestine, the gills pass through here and then in the anus,

6
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expulse the solid and liquid part that the body doesn't need.

7
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Very good!