NREMT Paramedic

Category - Medical

What is the main function of white blood cells?
  1. They carry oxygen to the tissues of the body.
  2. They aid the immune system in fighting infection.
  3. They aid in blood clotting.
  4. They aid in oxygen exchange
Explanation
Answer: B - The main function of white blood cells is to aid the immune system in fighting off infection.
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