Bursa of Fabricius

bursa of Fabricius

[′bər·sə əv fə′brēsh·əs] (vertebrate zoology) A thymus-like organ in the form of a diverticulum at the lower end of the alimentary canal in birds.

Bursa of Fabricius

(named after G. Fabricius), a pouchlike thick-walled formation in birds, situated on the dorsal surface of the rear section of the cloaca. The bursa of Fabricius is well developed in all young birds until they reach sexual maturity, at about eight or nine months, when it becomes reduced. Rheas are the only birds in which it does not become reduced. The function of the bursa of Fabricius has not been clearly established; lymphatic cells and oxyphile leucocytes are formed inside it.

bursa of Fabricius

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" >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 lymphocytes" >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.subacromial bursa one between the acromion and the insertion of the supraspinatus muscle, extending between the deltoid and the greater tubercle of the humerus. See illustration.

Subacromial bursa, lying between the acromion and supraspinatus tendon and extending between the deltoid and greater tubercle. From Dorland's, 2000.

bur·sa fa·bri·c'i·i

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)n. A lymphoid gland in birds that is connected to the cloaca and is the site of B cell maturation.

bursa of Fabricius

Lymphoid tissue at the junction of the cloaca and the gut in birds, which gives rise to B lymphocytes.

bursa of Fabricius

An 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 Fabriciusbursa of Fabricius - Synonym(s): bursa fabriciiFabricius ship - the outlines of the sphenoid, occipital, and frontal bones, from their fancied resemblance to the hull of a ship.

单词	bursa of fabricius
释义	bursa of Fabricius bursa of Fa·bri·ci·us B0568100 (fə-brĭsh′ē-əs, -brĭsh′əs)n. A lymphoid gland in birds that is connected to the cloaca and is the site of B cell maturation. [After Hieronymus Fabricius (1537-1619), Italian anatomist.] bur′sa of Fa•bri′ci•us (fəˈbrɪʃ i əs, -ˈbrɪʃ əs) n. a lymphoid gland of the cloaca in immature birds. [after Hieronymus Fabricius ab Aquapendente (1537–1619), Italian anatomist, who discovered it] Bursa of Fabricius bursa of Fabricius [′bər·sə əv fə′brēsh·əs] (vertebrate zoology) A thymus-like organ in the form of a diverticulum at the lower end of the alimentary canal in birds. Bursa of Fabricius (named after G. Fabricius), a pouchlike thick-walled formation in birds, situated on the dorsal surface of the rear section of the cloaca. The bursa of Fabricius is well developed in all young birds until they reach sexual maturity, at about eight or nine months, when it becomes reduced. Rheas are the only birds in which it does not become reduced. The function of the bursa of Fabricius has not been clearly established; lymphatic cells and oxyphile leucocytes are formed inside it. bursa of Fabricius 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" >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 lymphocytes" >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.subacromial bursa one between the acromion and the insertion of the supraspinatus muscle, extending between the deltoid and the greater tubercle of the humerus. See illustration. Subacromial bursa, lying between the acromion and supraspinatus tendon and extending between the deltoid and greater tubercle. From Dorland's, 2000. bur·sa fa·bri·c'i·i 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)n. A lymphoid gland in birds that is connected to the cloaca and is the site of B cell maturation. bursa of Fabricius Lymphoid tissue at the junction of the cloaca and the gut in birds, which gives rise to B lymphocytes. bursa of Fabricius An 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 Fabriciusbursa of Fabricius - Synonym(s): bursa fabriciiFabricius ship - the outlines of the sphenoid, occipital, and frontal bones, from their fancied resemblance to the hull of a ship. ThesaurusSeeBursa
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bursa of Fabricius

bursa of Fa·bri·ci·us

bur′sa of Fa•bri′ci•us

Bursa of Fabricius

bursa of Fabricius

Bursa of Fabricius

bursa of Fabricius

bursa

bur·sa fa·bri·c'i·i

bursa of Fabricius

bursa of Fabricius

bursa of Fabricius

Fabricius,