the function of a bursa is to reduce friction by buoyancy.
the function of a bursa is to reduce friction by buoyancy.
the function of a bursa is to reduce friction?
buoyancy
synovial bursa









































a synovial bursa (plural bursae or bursas) is a small fluid-filled sac lined by synovial membrane with an inner capillary layer of viscous synovial fluid (similar in consistency to that of a raw egg white). it provides a cushion between bones and tendons and/or muscles around a joint. this helps to reduce friction between the bones and allows free movement. bursae are found around most major joints of the body.









































section::::structure.
synovial bursa
it is located anterior to the subscapularis muscle and inferior to the coracoid process. its function is to reduce friction between the coracobrachialis, subscapularis and short head of the biceps tendons, thus facilitating internal and external rotation of the shoulder. the subcoracoid bursa does not communicate with the glenohumeral joint under normal circumstances, but may communicate with the subacromial bursa. as such, contrast fluid injected into the glenohumeral joint during an arthrogram that extends into the subcoracoid bursa is abnormal, and indirectly implies a full thickness rotator cuff tear.
subcoracoid bursa