Te Synovial Membrane

The inner membrane of synovial joints is called the synovial membrane and secretes synovial fluid into the joint cavity.

synovial fluid

water :) i know, it's so simple&you thought it was more complicated. but yes, it's water. haha.

Synovial fluid is the fluid found in synovial joints, and is secreted by the synovial membrane. The shoulder, elbow, wrist, hip, knee and ankle are synovial joints, as are metacarpo- and metatarsophalangeal and interphalangeal joints.