Bursa is the unique structure of the birds, is located at the top of the post-cloacal, the wall is full of lymphoid tissue.
法氏囊是鸟类特有的结构，位于泄殖腔后上方，囊壁充满淋巴组织。
In this experiment, The structure of gut-associated lymphoid tissue(GALT) of semi-muscovy ducks were studied by light, scanning electron microscope and transmission electron microscope.
本试验通过光镜、扫描电镜及透射电镜，对半番鸭小肠的肠相关淋巴组织（GALT）的结构进行了研究；
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