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

Respuesta :

Answer:

Respiratory System

Explanation:

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

Answer:
Oxygen enters the body thru the respiratory system
Explanation:

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