Question

1 . Are there any parts of the human body that get oxygen directly from the air and not from the blood?

2 . Are there nuclear reactions going on in our bodies?

3 . Can humans ever directly see a photon?


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Answer 1

1. Yes... it's cornea of eyes.
2. Only when any radioactive element has entered the body.
3. No... human eyes are not programmed to see just one photon.

Answer 2

Answer:

cornea

yes nuclear reactions are going in our body ex eating of food that naturally contain radioactive isotopes

yes photons are the only thing that humans can directly seen photon is a bit of light