The integrated body system of organs, tissues, cells, and cell products such as antibodies that differentiates self from nonself and neutralizes potentially pathogenic organisms or substances.免疫系统：器官、组织、细胞和细胞产物（如抗体）的综合生理系统，能区分同类和异类，并且使可能病变的生物体或物质不产生作用