The tonsils play an important role in the immunity of human bodies,especially in the local immunity.As a second-class lymph organ,the tonsil also belongs to the adenoid tissue interrelated to mucosae.

• 扁桃体在人体的免疫,特别是局部免疫中起着重要作用,作为一个二级淋巴器官,处于病原入侵机体的门户,又属于黏膜相关淋巴组织,其免疫机能十分复杂。