25 POINTS!!!!!!!
A pathogen that enters the respiratory track would have to get past which of the following respiratory defenses before being able to infect the bloodstream?
ACilia and red blood cells
BCilia and white blood cells
CFlagella and white blood cells
DFlagella and red blood cells
A pathogen that enters the respiratory track would have to get past which of the following respiratory defenses before being able to infect the bloodstream?
ACilia and red blood cells
BCilia and white blood cells
CFlagella and white blood cells
DFlagella and red blood cells