bursa of Fabricius

bursa of Fabricius
bursa of Fa·bri·cius -fə-'brish(-ē)-əs n a blind glandular sac that opens into the cloaca of birds and functions in B cell production
Fabricius Johann Christian (1745-1808)
Danish entomologist. Fabricius was one of the outstanding entomologists of his time. A student of Carolus Linnaeus, he is known for his extensive taxonomic research that led to his classifying insects according to the structure of their mouthparts and not of their wings. His entomological classification was first published in 1775 followed by another work a year later. Eventually he named and described about 10,000 insects. He is also remembered for his views on evolution. He held that new species and varieties could arise through hybridization and by environmental influences on structure and function.

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a lymphoid organ of birds that, like the thymus, develops as an epithelial outpouching of the gut but near the cloaca rather than the foregut; it atrophies at 5 or 6 months of age, persisting as a fibrous remnant in sexually mature birds; before involution it is the site of maturation of B lymphocytes (q.v.).

Medical dictionary. 2011.

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  • Bursa of Fabricius — In birds, the bursa of Fabricius (Latin: Bursa cloacalis or Bursa fabricii ) is the site of hematopoiesis, a specialized organ that, as first demonstrated by Bruce Glick and later by Max Cooper and Robert Good, is necessary for B cell development …   Wikipedia

  • bursa of fabricius — fəˈbrish(ē)əs Usage: usually capitalized F Etymology: translation of New Latin bursa Fabricii, from bursa + Fabricii, gen. of Fabricius (Hieronymous Fabricius of Aquapendente died 1619 Italian anatomist) : a blind glandular sac that opens into… …   Useful english dictionary

  • bursa of Fabricius — Etymology: Johan C. Fabricius died 1808 Danish entomologist Date: 1945 a lymphoid organ that opens into the cloaca of birds and functions in B cell production …   New Collegiate Dictionary

  • bursa of Fabricius — Ornith. a lymphoid gland of the cloaca in birds, believed to function in disease resistance, and closing or disappearing as the bird ages. [after Hieronymus Fabricius ab Aquapendente (1537 1619), Italian anatomist, who discovered it] * * * …   Universalium

  • bursa of Fabricius — bur′sa of Fa•bri′ci•us [[t]fəˈbrɪʃ i əs, ˈbrɪʃ əs[/t]] n. orn a lymphoid gland of the cloaca in immature birds • Etymology: after Hieronymus Fabricius ab Aquapendente (1537–1619), Italian anatomist, who discovered it …   From formal English to slang

  • bursa of Fabricius — (běr sě fě bris e ěs) Found in birds; the blind saclike structure located on the posterior wall of the cloaca; it performs a thymuslike function. A primary lymphoid organ where B cell maturation occurs. Bone marrow is the equivalent in mammals …   Dictionary of microbiology

  • Bursa of Fabricius — A lymphoid tissue found at the junction of the cloaca and the gut of birds giving rise to the so called B lymphocyte series …   Dictionary of molecular biology

  • Bursa (disambiguation) — Bursa may refer to: * Bursa (formerly known as Brusa and Prusa ), the capital of Bursa Province, Turkey ** Bursa Province, Turkey ** the Bursa meteorite of 1946, which fell in Bursa, Turkey (see Meteorite falls) * Bursa (pigeon), a breed of… …   Wikipedia

  • Bursa — A bursa is a closed fluid filled sac that functions to provide a gliding surface to reduce friction between tissues of the body. When the bursa becomes inflamed, the condition is known as "bursitis." Most commonly this is not an… …   Medical dictionary

  • Bursa (anatomy) — Infobox Anatomy Name = PAGENAME Latin = GraySubject = GrayPage = Caption = Within the knee joint: bursae visible top right and bottom right Caption2 = Precursor = System = Artery = Vein = Nerve = Lymph = MeshName = Bursa,+Synovial DorlandsPre = b …   Wikipedia

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