《英文msh词典》Fabricius Bursa
[入口词] Fabricius Bursa
[主题词] Bursa of Fabricius
[英文释义] An epithelial outgrowth of the cloaca in birds similar to the thymus in mammals. It atrophies within 6 months after birth and remains as a fibrous remnant in adult birds. It is composed of lymphoid tissue and prior to involution,is the site of B-lymphocyte maturation.