Question

Can I have help with this question
(It's in the picture)​

Answer 1

First line of defense ⇒ mechanical barriers that prevent microorganisms from entering the body

Second line of defense ⇒ cells and prosses that help remove or neutralize organisms that have penetrated mechanical barriers.

Third line of defense ⇒ complex defense that recognizes and reacts to specific organisms.

I hope this helps!