一、免疫系统由免疫器官、免疫细胞和免疫分子组成。二、免疫系统是防卫病原

First, the immune system, immune organ, immune molecules and immune cells. <br>Second, the immune system is the defense of invading pathogens most effective weapon that can detect and remove environmental fluctuations caused by factors within the foreign body, foreign pathogenic microorganisms. But hyperthyroidism will have its own organ or tissue function harm.

The immune system consists of immune organs, immune cells and immune molecules.<br>Second, the immune system is the most effective weapon to protect against pathogen invasion, it can find and remove foreign bodies, foreign pathogenic microorganisms and other factors causing internal environmental fluctuations. But the advance of its function can cause damage to its own organs or tissues.

1、 The immune system consists of immune organs, immune cells and immune molecules.<br>2、 The immune system is the most effective weapon to defend the invasion of pathogens. It can find and remove foreign bodies, foreign pathogenic microorganisms and other factors that cause the fluctuation of internal environment. But its function will damage its organs or tissues.<br>