A breathing mask is used for keeping harmful particles from entering the respiratory system.
All smoke is harmful to the respiratory system.
A breathing mask is used to keep smoke out of the respiratory system.
What keeps smoke out of the respiratory system?
(1) Cooking
(2) Masks
(3) Glasses
(4) skin
(5) Gloves
(6) Hats
(7) Urea
(8) oxygen