Science Class 5 Human Body and Health

Asked by AKSHAY GURU VARADHARAJAN · SRI CHAITANYA TECHNO SCHOOL, JAYANTI NAGAR.

When we breathe in, we inhale different types of gases including oxygen. What happens to the gases that the body does not or cannot use?

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A They will be circulated around the body and then exhaled out
B The digestive system will absorb them and use them to create energy
C They are exhaled without being circulated around the body
D The lungs will convert some of them into oxygen

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Answer: C. They are exhaled without being circulated around the body

They are exhaled without being circulated around the body.
When you breathe, only the oxygen moves from your lungs into your blood to travel through your body. Other gases, like nitrogen, simply sit in your lungs for a moment and are pushed right back out when you exhale.

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When we breathe in, we inhale different types of gases including oxygen. What happens to the gases that the body does not or cannot use?

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