A breathing mask is used for keeping harmful particles from entering the respiratory system.
When inhaled, the particles lodge in the respiratory system, causing or aggravating health problems.
A breathing mask keeps harmful particles from being inhaled and causing health problems.
a breathing mask keeps what from being inhaled and causing health problems?
Options:
1) cigarettes
2) harmful particles
3) chemical changes
4) influenza
5) oxygen particles
6) hydrogen and oxygen
7) air particles
8) atmosphere particles