bursa

(noun)

any of the many small fluid-filled sacs located at the point where a muscle or tendon slides across bone, which reduce friction between the two moving surfaces

Related Terms

  • bursitis

Examples of bursa in the following topics:

  • Bursae and Tendon Sheaths

    • Joints are cushioned by small fluid-filled sacs called bursae and stabilized by tough bands of fibrous connective tissue called tendons.
    • A bursa (plural bursae) is a small, fluid-filled sac lined by synovial membrane with an inner capillary layer of fluid (synovial fluid) with the consistency of raw egg white.
    • Bursae occur at sites of shearing in subcutaneous tissue or between deeper tissues such as muscle groups and fascia.
    • Many bursae develop during growth, but new or adventitious bursae can occur at sites of occupational friction.
    • Bursae are found around most major joints of the body, such as the shoulder and the knee.
  • Bursitis

    • Bursitis is the inflammation of one or more bursae (small sacs) of synovial fluid in the body .
    • The bursae rest at the points where muscles and tendons slide across bone.
    • The bursa and the surrounding joint become stiff the next morning.
    • Bursae that are infected require further investigation and antibiotic therapy.
    • In a bursectomy, the bursa is cut out either endoscopically or with open surgery.
  • Double Fertilization in Plants

    • In non-endospermic dicots, such as Capsella bursa, the endosperm develops initially, but is then digested.
    • Shown are the stages of embryo development in the ovule of a shepherd's purse (Capsella bursa).
  • Overview of the Musculoskeletal System

    • Also made of fibrous tissue are bursae.
  • The Peritoneum

    • The second is the lesser sac or omental bursa, and is represented in blue in the image.
    • The epiploic foramen, greater sac or general cavity (red) and lesser sac, or omental bursa (blue).
  • Structure of Synovial Joints

    • The synovial bursa is a small, fluid-filled sac lined by synovial membrane containing synovial fluid.
  • Islamic Architecture

    • Ottoman mosques and other architecture first emerged in the cities of Bursa and Edirne in the 14th and 15th centuries, developing from earlier Seljuk Turk architecture, with additional influences from Byzantine, Persian, and Islamic Mamluk traditions.
  • The Fall of Constantinople

    • Osman's son, Orhan, captured the city of Bursa in 1324 and made it the new capital of the Ottoman state.
    • The fall of Bursa meant the loss of Byzantine control over Northwestern Anatolia.
  • Pharynx

    • Superior to the pharyngeal tonsil, in the midline, an irregular flask-shaped depression of the mucous membrane sometimes extends upward; it is known as the pharyngeal bursa.
  • Ottoman Empire

    • Ottoman mosques and other architecture first emerged in the cities of Bursa and Edirne in the 14th and 15th centuries, developing from earlier Seljuk Turk architecture, with additional influences from Byzantine, Persian, and Islamic Mamluk traditions.
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