The combining form nas/o means nose. what does nasal mean?

The combining form nas/o means nose. What does nasal mean?
all that is relative to the nose, in relation to the nose.

It is very important to stay hydrated. your body needs it for may things for cells, tissues, your organs and etc. water also with your temperature that way you don’t get a headache etc. i bet if you look it up there will be a lot of things you can learn.