FABRICIUS BURSA
\fˈabɹɪʃəs bˈɜːsə], \fˈabɹɪʃəs bˈɜːsə], \f_ˈa_b_ɹ_ɪ_ʃ_ə_s b_ˈɜː_s_ə]\
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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.
By DataStellar Co., Ltd
