How is the knee poorly protected and vulnerable to injuries?

The knee is poorly protected due to its anatomical structure, which includes a complex arrangement of ligaments, tendons, and cartilage that provide stability but leave it susceptible to injuries. Unlike other joints, there is minimal muscle coverage around the knee, making it more exposed to trauma from direct impacts or sudden movements. Additionally, its reliance on ligaments for stability means that excessive force or twisting can easily lead to sprains or tears. This combination of factors contributes to the knee's vulnerability in sports and everyday activities.