why do humans need a digestive system?
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Answer:
to absorb nutrients from food
Explanation:
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Answer:
Humans need digestive system as all the food we eat are made up of complex substances.
Explanation:
The food we eat are made of complex substance and our body can not get energy directly from them and hence the food complexity should be broken down to get energy and our digestive system do this work. Therefore digestive system is needed.
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