👉 The fighting fluid, also known as synovial fluid, is a viscous, clear liquid found within the joints of the human body. It serves as a lubricant and shock absorber, reducing friction between bones during movement and protecting the joint surfaces from wear and tear. This fluid is rich in hyaluronic acid, which gives it its viscous properties, and contains nutrients that nourish the cartilage. When joints are healthy, fighting fluid maintains a balanced consistency, ensuring smooth and pain-free movement; however, in cases of injury or disease, it can become thickened or depleted, leading to joint pain and reduced mobility.