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。
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。
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