bursa

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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.
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.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

bur·sa

, pl.

bur·sae

(ber'să, ber'sē), [TA]
A closed sac or envelope lined with synovial membrane and containing synovial fluid, usually found or formed in areas subject to friction (for example, over an exposed or prominent body part or where a tendon passes over a bone).
[Mediev. L., a purse]
Farlex Partner Medical Dictionary © Farlex 2012

bursa

(bûr′sə)
n. pl. bur·sae (-sē) or bur·sas
A sac or saclike bodily cavity, especially one containing a viscous lubricating fluid and located between a tendon and a bone or at points of friction between moving structures.

bur′sal adj.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

bursa

A closed tissue space within a joint, which is lined by a synovial membrane, contains hyaluronic acid and lubricin-rich synovial fluid, and which serves as a gliding surface to reduce friction within a joint.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

bur·sa

, pl. bursae (bŭr'să, -sē) [TA]
A closed sac or envelope lined with synovial membrane and containing synovial fluid, usually located or formed in areas subject to friction (e.g., over an exposed or prominent part or where a tendon passes over a bone).
[Mediev. L., a purse]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

bursa

A small fibrous sac lined with a membrane which secretes a lubricating fluid (synovial membrane). Bursas are efficient protective and friction-reducing structures and occur around joints and in areas where tendons pass over bones.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
References in periodicals archive ?
The data showed that there were 66 differential expressed miRNAs in the brusa of Fabricius between the two varieties of ducks.
Brusa, L., Petta, F., Pisani, A., Moschella, V., Iani, C., Stanzione, P, ...
"Mumsie is the first skin care line designed specifically for the needs of pre- and post-partum women to feature innovative, natural/organic and highly effective ingredients vital to younger, natural-looking skin," said marketing director Carrie Brusa.
For sorting, samples may be treated by the method of reduction of oxygen (Schockaert, 1996) or by examining all sampling water under the stereomicroscope (Brusa et al., 2003).
Brusa L, Petta F, Pisani A, Moschella V, Iani C, Stanzione P, et al.
(19) Lehmer, B.D., Xue, Y.Q., Brandt, W.N., Alexander, D.M., Bauer, F.E., Brusa, M., Comastri, A., Gilli, R., Hornschemeier, A.E., Luo, B., Paolillo, M., Ptak, A., Shemmer, O., Schneider, D.P., Tozzi, P.
En el caso de la mayor parte de los paises democraticos, con muy pocas excepciones (tal vez uno de los mas destacable sea el caso italiano; Brusa 2013), los curriculos de historia giran con casi total exclusividad alrededor de la historia nacional narrada de manera lineal y progresiva destacando los grandes heroes e individualidades nacionales que han llevado al pais a ser la potencia que es.
Turbellarians similar to Paravortex are commonly found inhabiting the intestinal lumen of bivalves without apparent host damage (Brusa et al., 2011; Cremonte, 2011).
Zakary Brusa, 24, of 1 Birch St., Worcester, charged with aggravated assault and battery and intimidation of a witness/juror/police officer/court official, continued to March 26 on $1,500 cash bail.