Synovial fluid
Synovia
Definition
The secretion of the synovial membrane is thick, viscid, and glairy, like the white of an egg, called synovial fluid (synovia)*.
Its principal role is to reduce friction between the articular cartilage of synovial joints during movement.
The synovial fluid is a small component of the transcellular fluid component of extracellular fluid.
*The term synovia from Greek συν- "with" and Latin ovum "egg" and -ia because it resembles egg white in consistency and external appearance.
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