The hip is the
largest ball-and-socket joint in the body. The thighbone (femur) fits tightly
into a cup-shaped socket (acetabulum) in the pelvis. The hip joint is held
together by a joint capsule, tendons, ligaments, and the muscles of the buttocks, groin, and spine.
ByHealthwise Staff Primary Medical ReviewerWilliam H. Blahd, Jr., MD, FACEP - Emergency Medicine Specialist Medical ReviewerH. Michael O'Connor, MD - Emergency Medicine