The surgical bursectomy of White Peking Duck embryos inhibited the development of spleen, mainly the development of the germinal center and the periellipsoidal lymphatic sheath ( PELS) as bursa-dependent areas in spleen. 北京鸭胚胎期外科切除腔上囊抑制了脾的发育,主要是生发中心、围鞘毛细血管淋巴鞘(PELS)等腔上囊依赖区的发育。
The 21-day embryonic bursectomy and later 26-day embryonic bursectomy did not differ in effect on peripheral lymphoid organs. 胚胎中晚期和胚胎晚期切除腔上囊对外周淋巴器官发生的影响差别不大。