bursa

A sac-like structure lined by synovial cells which serve to reduce the friction that arises from motion between facial planes. Over 100 bursae are found in the human body which tend to overly bony prominences where muscle or tendons pass. The bursae are generally named for the structures with which they are associated. Fluid obtained from bursae generally has a low cell count with a predominance of monocytes.

Specific

bursa of extensor carpi radialis brevis muscle coracobrachial/subcoracoid bursa hyoid bursa iliopectineal bursa ischial bursa ischiogluteal bursa laryngeal bursa; subcutaneous bursa of the laryngeal prominence olecranon bursa omental bursa; epiploic sac; lesser peritoneal cavity/sac; omental sac pes anserine bursa prepatellar bursa retrocalcaneal bursa; achilles bursa; bursa of calcaneal tendon subacromial bursa subcutaneous calcaneal bursa subdeltoid bursa subtendinous bursa of infraspinatus subtendinous bursa of subscapularis subtendinous bursa of triceps brachii suprapatellar bursa trochanteric bursa

References

Saunders Manual of Medical Practice, Rakel (ed), WB Saunders, Philadelphia, 1996, pg 673