Dictionary > Synovial fluid

Synovial fluid

Definition
noun
A clear, viscid fluid in the synovial joints and secreted by the membrane that lines the joints
Supplement
The synovial joints are the joints that line opposing bony surfaces. The general components of a synovial joint are the joint capsule, a layer of articular cartilage, and a synovial cavity. The synovial cavity is the space between the opposing bones. This cavity is filled with a transparent, viscid fluid called synovial fluid (also referred to as synovia). This fluid comes from the inner layer of the joint capsule called the synovial membrane.
The synovial fluid is composed largely of hyaluronic acid and lubricin. It also contains phagocytic cells. Hyaluronic acid is a linear mucopolysaccharide. It is a non-sulphated glycosaminoglycan that provides lubrication and increases viscosity of articular cartilages. It is produced and released by the fibroblast-like type B cells of the synovial membrane. The lubricin is another lubricating substance released by surface chondrocytes of the articular cartilage. It helps provide boundary-layer lubrication. The phagocytic cells in the synovial fluid carry out the role of removing cellular debris and microbes in the fluid.
The functions of synovial fluid are to lubricate the articulating joints, to supply nutrients and oxygen, and to remove metabolic wastes.
Synonym(s):

  • synovia

See also:

  • synovial joint
  • synovial membrane
  • hyaluronic acid
  • transcellular fluid


  • You will also like...

    human respiratory system
    Respiration

    The human respiratory system is an efficient system of inspiring and expiring respiratory gases. This tutorial provides ..

    Structural depiction of catalase, an enzyme
    Protein Activity and Cellular Metabolism

    Proteins have a crucial role in various biological activities. Get to know how proteins are able to perform as enzymes, ..

    New Zealand - Biodiversity fauna
    New Zealand’s Biodiversity

    Find out more about New Zealand's unique biodiversity by exploring a range of different ecosystems and the key role of s..

    Thermographic image of face and neck
    Regulation of Organic Metabolism, Growth and Energy Balance

    The human body is capable of regulating growth and energy balance through various feedback mechanisms. Get to know the e..

    Genetics – Lesson Outline & Worksheets
    Genetics – Lesson Outline & Worksheets

      Topics Modules Quizzes/Worksheets Description Introduction to Genetics Genetics – Definition: Heredity and ..

    Freshwater aquatic plankton
    Freshwater Communities & Plankton

    Planktons are microscopic organisms that live suspended in aquatic habitats. There are two groups: the phytoplanktons an..

    Related Articles...

    No related articles found

    See all Related Topics