<Li> Compound joint: three or more articulation surfaces (e.g. radiocarpal joint) </Li> <Li> Complex joint: two or more articulation surfaces and an articular disc or meniscus (e.g. knee joint) </Li> <P> The joints may be classified anatomically into the following groups: </P> <Ol> <Li> Joints of hand </Li> <Li> Elbow joints </Li> <Li> Wrist joints </Li> <Li> Axillary articulations </Li> <Li> Sternoclavicular joints </Li> <Li> Vertebral articulations </Li> <Li> Temporomandibular joints </Li> <Li> Sacroiliac joints </Li> <Li> Hip joints </Li> <Li> Knee joints </Li> <Li> Articulations of foot </Li> </Ol>

What is the structural classification of the hip joint