bursa of Fabricius
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bursa[bur´sah] (pl. bur´sae) (L.)
a small fluid-filled sac or saclike cavity situated in places in tissues where friction would otherwise occur. adj., adj bur´sal. Bursae function to facilitate the gliding of muscles or tendons over bony or ligamentous surfaces. They are numerous and are found throughout the body; the most important are located at the shoulder, elbow, knee, and hip. Inflammation of a bursa is known as bursitis.
bursa of Fabricius an epithelial outgrowth of the cloaca in chick embryos, which develops in a manner similar to that of the thymus in mammals, atrophying after 5 or 6 months and persisting as a fibrous remnant in sexually mature birds. It contains lymphoid follicles, and before involution is a site of formation of B-lymphocytes associated with humoral immunity.
bursa muco´sa (mucous bursa) (synovial bursa) a closed synovial sac interposed between surfaces that glide upon each other; it may be subcutaneous, submuscular, subfascial, or subtendinous in location.
the bursa of Fabricius in poultry, a blind saclike structure located on the posterodorsal wall of the cloaca; it performs a thymuslike function.
Synonym(s): bursa of Fabricius
bursa of Fabricius(fə-brĭsh′ē-əs, -brĭsh′əs)
A lymphoid gland in birds that is connected to the cloaca and is the site of B cell maturation.
bursa of FabriciusLymphoid tissue at the junction of the cloaca and the gut in birds, which gives rise to B lymphocytes.
bursa of FabriciusAn organ in the cloacal-hind gut junction birds found to be important in the maturation of B lymphocytes (B for bursa). The equivalent in humans is probably the tonsils or lymphoid tissue in the intestine.
Fabricius,Girolamo (Hieronymus ab Aquapendente), Italian anatomist and embryologist, 1537-1619.
bursa fabricii - in poultry, a blind saclike structure located on the posterodorsal wall of the cloaca. Synonym(s): bursa of Fabricius
bursa of Fabricius - Synonym(s): bursa fabricii
Fabricius ship - the outlines of the sphenoid, occipital, and frontal bones, from their fancied resemblance to the hull of a ship.