免めん疫えき系けいめんえきけいMeanings1nounimmune systemBiological term for the body's defense system against pathogens.免めん疫えき系けいが正せい常じょうに機き能のうしていると、病びょう気きにかかりにくくなる。When the immune system functions normally, you become less susceptible to illness.
