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Oxygen ENTERS the body through the...

1.The circulatory system
2.The Digestive system
3.The respiratory system
4. The cells in the body

User Kausar
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2 Answers

7 votes
Answer:
Oxygen enters the body thru the respiratory system
Step-by-step explanation:

User Matthew Mullin
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12 votes

Answer:

Respiratory System

Step-by-step explanation:

It connects with the lungs. The oxygen enters the body through the capillaries which are a part of the respiratory system.

User Mohammadalijf
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