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。

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