免疫特權

sites survive periods

免疫特權部位：Immune privileged sites
定義：胚胎髮育過程中免疫細胞未接觸過的部位，如大腦、眼球內容物、精子等。In immune privileged sites, tissue grafts can survive for extended periods of time without rejection occurring，such as Brain、Eyes、Uterus when carrying a fetus、testis (sperm)。
免疫特權：在免疫隔離部位，一直同種異型抗原的組織不誘導應答，移植物不被排斥的現象。