Which type of joint is found in the knee?

The knee joint is classified as a hinge joint due to its primary function of allowing movement in one plane, specifically flexion and extension. This type of joint is characterized by its structure, where the rounded end of one bone fits into a groove or cavity of another bone, resembling the action of a door hinge.

In the case of the knee, the femur (thigh bone) fits into the tibia (shin bone) in such a way that it enables movement primarily forward and backward, while the design of the joint limits rotational movement. While the knee does have some degree of lateral movement, its most notable function remains the bending and straightening actions, typical of hinge joints.

Understanding the knee's classification helps in comprehending its biomechanics and the types of movements that can occur, which is essential for both anatomical study and practical application in fields like physical therapy and sports medicine.