bursa /bur·sa/ (bur´sah) pl. bur´sae [L.] a fluid-filled sac or saclike cavity situated in places in tissues where friction would otherwise occur.bur´sal
pharyngeal bursa,
bursa of Achilles tendon one between the calcaneal tendon and the back of the calcaneus.
anserine bursa one between the tendons of the sartorius, gracilis, and semitendinosus muscles, and the tibial collateral ligaments.
Calori's bursa one between the trachea and the arch of the aorta.
Fleischmann's bursa one beneath the tongue.
His bursa the dilatation at the end of the archenteron.
Luschka's bursa pharyngeal b.
omental bursa the lesser sac of the peritoneum.
pharyngeal bursa an inconstant blind sac located above the pharyngeal tonsil in the midline of the posterior wall of the nasopharynx; it represents persistence of an embryonic communication between the anterior tip of the notochord and the roof of the pharynx.
popliteal bursa a prolongation of the synovial tendon sheath of the popliteus muscle outside the knee joint into the popliteal space.
prepatellar bursa one of the bursae in front of the patella; it may be subcutaneous, subfascial, or subtendinous in location.
subacromial bursa one between the acromion and the insertion of the supraspinatus muscle, extending between the deltoid and greater tubercle of the humerus. 
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Subacromial bursa (bursa subacromialis), lying between the acromion and supraspinatus tendon and extending between the deltoid and greater tubercle.
subdeltoid bursa one between the deltoid and the shoulder joint capsule, usually connected to the subacromial bursa.
subtendinous iliac bursa one at the point of insertion of the iliopsoas muscle into the lesser trochanter.
synovial bursa a closed synovial sac interposed between surfaces that glide upon each other; it may be subcutaneous, submuscular, subfascial, or subtendinous in nature.
| pharyngeal bursa n. A cystic remnant of the notochord sometimes found in the posterior wall of the nasopharynx at the lower end of the pharyngeal tonsil. Also called Luschka's bursa. |
pharyngeal bursa,
a blind sac at the base of the pharyngeal tonsil.
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