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.

Answer 1

When Steve cut his hand, his first line of defense was broken.

Step-by-step explanation:

Your skin is your first line of immune defense.

Answer 2

His skin was the line of defense that was broken. Hope this helps.