Biology

Hanna Ramirez

22 June, 11:18

Identify how the physical barriers of the immune

system protect the body against pathogens.

Check all that apply.

•your nose produces oil to keep pathogens

from entering the body through your nose

•skin contains tightly packed cells

•skin is tough, flexible, and waterproof

•your cough when a pathogen enters your

mouth

•you sneeze when a pathogen enters your

nose