The knee joint is a complex joint located in the lower extremity that connects the thighbone, shinbone, and kneecap. It is one of the largest and most important joints in the body, responsible for supporting the body's weight and enabling movements such as walking, running, and jumping. Research on the knee joint focuses on understanding its biomechanics, structure, function, and pathology. This includes studying the various ligaments, tendons, cartilage, and other soft tissues that make up the knee joint, as well as the mechanics of how these structures work together during movement. Researchers in this area also investigate common knee injuries and conditions, such as osteoarthritis, ligament tears, and meniscus tears, and explore ways to prevent, diagnose, and treat these issues. Additionally, research on the knee joint may also involve developing new surgical techniques, rehabilitation strategies, and interventions to improve the overall health and function of the knee joint.