Biology

What is most of the oxygen that enters the human body taken in through?

More Questions from Biology
Which one of the following might a frog eat?
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What can an animal that eats berries and fish be called?
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What bird became extinct when settlers came to the island and let loose rats, which killed the birds?
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What are the thin bones that protect your lungs and heart?
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The Matamata turtle is found on which continent?
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Which of these is an example of a jawless fish?
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What is the most diverse group of gymnosperms?
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What is a similar group of animals that can breed with each other called?
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