ANATOMY

Detailed explanation-1: -Hinge joint – the two bones open and close in one direction only (along one plane) like a door, such as the knee and elbow joints.

Detailed explanation-2: -Hinge joints allow movement in one direction, as seen in the knees and elbows.

Detailed explanation-3: -Hinge joints function by allowing flexion and extension in one plane with small degrees of motion in other planes.

Detailed explanation-4: -The hinge joints allow movement in one plane only, that is up and down or backward and forward.

Detailed explanation-5: -A hinge joint (ginglymus or ginglymoid) is a bone joint in which the articular surfaces are molded to each other in such a manner as to permit motion only in one plane. According to one classification system they are said to be uniaxial (having one degree of freedom).