👉 The hand fluid, also known as synovial fluid, is a viscous, clear substance produced by the synovial membranes lining the joints in the body. It plays a crucial role in joint health by reducing friction between moving bones, lubricating the joints, and nourishing the cartilage that covers the ends of bones. This fluid also helps remove waste products from the joint tissues and aids in the absorption of nutrients from the digestive system. Maintaining adequate levels of hand fluid is essential for smooth joint movement and preventing conditions like arthritis.