Answered

Steve cut his hand deeply while working, and the wound became infected. When Steve first cut his hand, his
line of immune defense was broken.

Answer :

Answer:

2nd line of the immune system

Explanation:

Second line of defense was broken.

  • When pathogens pass through the first line of defense the second line of defense becomes active.

What is first line of defense?

  • The first line of defense  includes physical and chemical barriers that are always ready and prepared to defend the body from infection.
  • These include skin, tears, mucus, cilia, stomach acid, urine flow, friendly bacteria and white blood cells called neutrophils.

What is second line of defense?

  • The second line of defense of the innate system includes chemical signals that produce inflammation and fever responses as well as mobilizing protective cells and other chemical defenses.
  • The adaptive immune system mounts a highly specific response to substances and organisms that do not belong in the body.

To know more about body defense system here

https://brainly.com/question/12757244

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