东方白鹳与家禽腔上囊的形态学比较

The Morphological Comparison of the Bursae Cloacalis between the Oriental White Stork and the Fowl

利用光镜和透射电镜，观察了２只东方白鹳和鸡、鸭腔上囊的形态结构。东方白鹳腔上囊壁内的淋巴组织结构与家禽明显不同。东方白鹳腔上囊壁内的淋巴小结多呈扁椭圆形，皮质与髓质各位于小结的一侧，中间区呈窄条状、位于小结中间。多见２～３个淋巴小结对合成一个淋巴小叶。小叶中间是淋巴小结的髓质，两侧或周围是淋巴小结的皮质。淋巴小结的髓质外侧表面付有单层上皮。小叶内淋巴小结之间有窄的腔隙。家禽的淋巴小结中髓质位于中央，而皮质包于周围。中间区在皮髓交界处，呈环形包围在髓质周围。

The morphological structure of the bursae cloacalis(bursae of Fabricius)between the Oriental white stork and the fowl has been observed by a microscope and an electron gyroscope. There are some obvious differences between the Oriental white stork and the fowl on lymphatic tissue of bursae cloacalis. In the wall of the bursae cloacalis of the Oriental white stork,there are a lot of lymphatic nodules which are oblate and elliptical shape. The conical area is located at a side of the lymphatic nodule and medullary area is the another side. The mid area which is narrow is located at the coddle of the lymphatic nodule. Two of lymphatic nodules combine each other,which form into a lymphatic lobule. The middle part of the lobule consists of the medullary substances of the two lymphatic nodules and the two sides consist of cortexes. On the medullary substance surface,there is a layer of simple epithelium. In the lobule, there is a small and narrow gap between the two lymphatic nodules. The medullary area of the fowl is located at the centre of the lymphatic nodules and the conical area is around the verge of the medullary. The middle area which is different from the Oriental white stork circles between the medullary and conical area.