Breathing masks are used to keep harmful particles from entering the mouth and the what?
body eyes air skin gullet nose ears lungs
A B C D E F G H
Oxygen enters the respiratory system through the mouth and the nose.
Breathing masks are used to keep harmful particles from entering the mouth and the nose.
Breathing masks are used to keep harmful particles from entering the mouth and the what? (A) body (B) eyes (C) air (D) skin (E) gullet (F) nose (G) ears (H) lungs