Multiple choice

Which system of our body works against the disease-causing microbes?

  1. The nervous system

  2. The respiratory system

  3. The immune system

  4. The muscular system

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The immune system is the body's defense network that identifies and destroys disease-causing microbes through white blood cells, antibodies, and other defense mechanisms. The nervous system transmits signals, the respiratory system handles gas exchange, and the muscular system enables movement - none directly fight pathogens.