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Synovial fluid, also called synovia, is a viscous, non-Newtonian fluid found in the cavities of synovial joints. With its egg white –like consistency, [ 1 ] the principal role of synovial fluid is to reduce friction between the articular cartilage of synovial joints during movement. [ 2 ]
The water of synovial fluid is not secreted as such but is effectively trapped in the joint space by the hyaluronan. The macrophage-like synovial cells (derived from monocytes in blood) [3] are responsible for the removal of undesirable substances from the synovial fluid (hence are rich in Golgi apparatus). It accounts for approximately 25% of ...
The word "synovium" is derived from the word "synovia" (or synovial fluid), which is a clear, viscous fluid produced by the synovium, and its main purpose is to reduce friction between the joint cartilages during movement. Synovium is also important to maintain proper joint function by providing the structural support and supply of the ...
The synovial cavity/joint is filled with synovial fluid. The joint capsule is made up of an outer layer of fibrous membrane, which keeps the bones together structurally, and an inner layer, the synovial membrane, which seals in the synovial fluid. They are the most common and most movable type of joint in the body of a mammal.
A synovial bursa, usually simply bursa (pl.: 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 ...
For example, synovial membranes surround the joints of the shoulder, elbow, and knee. Fibroblasts in the inner layer of the synovial membrane release hyaluronan into the joint cavity. The hyaluronan effectively traps available water to form the synovial fluid , a natural lubricant that enables the bones of a joint to move freely against one ...
A small amount of fluid, called transcellular fluid, does exist normally in such spaces. For example, the aqueous humor, the vitreous humor, the cerebrospinal fluid, the serous fluid produced by the serous membranes, and the synovial fluid produced by the synovial membranes are all transcellular fluids. They are all very important, yet there is ...
Knee effusion, informally known as water on the knee, occurs when excess synovial fluid accumulates in or around the knee joint. It has many common causes, including arthritis, injury to the ligaments or meniscus, or fluid collecting in the bursa, a condition known as prepatellar bursitis.