免めん疫えき機き構こう

noun

immune system

Medical/biological term for the body's defense system against pathogens.

• 免めん疫えき機き構こうが正せい常じょうに働はたらかないと、病びょう気きにかかりやすくなる。

  If the immune system does not function properly, one becomes more susceptible to illness.