Synovial bursa
Within the knee joint: bursae visible top right and bottom right
Latin	bursa synovialis
Gray's	subject #68 283
MeSH	Bursa,+Synovial

A bursa (plural bursae or bursas; Latin: Bursa synovialis) is a small fluid-filled sac lined by synovial membrane with an inner capillary layer of slimy 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 filled with synovial fluid and are found around most major joints of the body.

Contents 1 Etymology 2 Pathology 3 See also 4 External links

[edit] Etymology

Bursa is Latin for purse, due to its resemblance to a purse. There are different types of bursa.

[edit] Pathology

Infection or irritation of a bursa leads to bursitis (inflammation of a bursa). The general term for disease of bursae is "bursopathy". Current medical studies have no specific knowledge of the entire bursae system.

[edit] See also

• Bursa of Fabricius (a lymphatic organ in birds)
• Bursectomy
• Bursa of the knee joint

[edit] External links

• Image
• Diagram of elbow with olecranon bursa
• -831848371 at GPnotebook

v • d • e Joints (TA A03.0, GA 3.284) Types fibrous: Gomphosis · Suture · Syndesmosis · Interosseous membrane cartilaginous: Synchondrosis · Symphysis synovial: Plane joint · 1° (Hinge joint, Pivot joint) · 2° (Condyloid joint, Saddle joint) · 3° (Ball and socket joint) by range of motion: Synarthrosis · Amphiarthrosis · Diarthrosis Terminology Kinesiology · Anatomical terms of motion · Agonist/Antagonist Motions general: Flexion/Extension · Adduction/Abduction · Internal rotation/External rotation · Elevation/Depression specialized/upper limbs: Protraction/Retraction · Supination/Pronation specialized/lower limbs: Plantarflexion/Dorsiflexion · Eversion/Inversion Components capsular: Articular capsule (Synovial membrane, Fibrous membrane) · Synovial fluid · Synovial bursa · Articular disk/Meniscus extracapsular: Ligament · Enthesis joint navs: anat, non-congenital arthropathies/deformities/dorsopathies/soft tissue arthropathy/congenital, eponymous signs, proc

v • d • e Synovial bursa and tendon sheaths (TA A04.8, GA 3, GA 4) Synovial bursa Upper limb Subacromial bursa · Olecranon bursa Lower limb Hip: Trochanteric bursa Bursae of the knee joint: Prepatellar bursa · Semimembranous bursa Tendon sheaths Upper limb Vincula tendina · Synovial sheath (Common flexor sheath of hand) Mucous sheaths on back of wrist Lower limb Mucous sheaths of the tendons around the ankle

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