the what is a defense against harmful particles from entering the body
lungs It remains dormant A virus immune system exoskeleton pancreas chickenpox liver
A B C D E F G H
Another respiratory defense is the immune system.
the immune system is a defense against harmful particles from entering the body
the what is a defense against harmful particles from entering the body (A) lungs (B) It remains dormant (C) A virus (D) immune system (E) exoskeleton (F) pancreas (G) chickenpox (H) liver