Question

Steve is a construction worker. He cut his hand deeply. The cut then became infected. Which line of immune defense was broken in his immune system? When Steve cut his hand, his line of defense was broken. NextReset

Answer 1

This would be the first line of defense.

Answer 2

O M G  i just did that one on Plato

well anyway i think the answer was the the skin because any thing that invades the body is a threat to the immune system.