Why does knee joint is the most complex joint in the body?

The knee joint is considered the most complex joint in the body due to its unique structure and function, comprising multiple components, including bones, cartilage, ligaments, and tendons. It serves as a hinge joint, allowing flexion and extension, while also accommodating slight rotational movements. The intricate interplay of these elements enables the knee to support body weight and facilitate various activities, from walking to running. Additionally, its vulnerability to injury and degenerative conditions further underscores its complexity.