Question: what does synovial fluid consist of?
Answer: In normal/healthy joint, the synovial fluid, which consists of an ultrafiltrate of blood plasma and glycoproteins contains HA macromolecules of molar mass ranging between 6–10 mega Daltons (Praest et al., 1997). SF serves also as a lubricating and shock absorbing boundary layer between moving parts of synovial joints.