👉 The own fluid, also known as synovial fluid, is a viscous, lubricating substance produced by synovial joints in the human body. It serves to reduce friction between the articular cartilage surfaces during joint movement, facilitating smooth and pain-free motion. This fluid also provides nutrients to the cartilage, helps remove metabolic waste products, and maintains the joint's overall health and lubrication. Composed mainly of water, proteins, hyaluronic acid, and various electrolytes, the own fluid's unique properties make it essential for joint function and mobility.