| A leveling head or ball-and-socket joint on the top of the tripod will be found of material aid in leveling the instrument. |
| Specializations for land walking are mainly found in the forelimbs, including a ball-and-socket joint in the shoulder, like that of mammals. |
| This ball-and-socket joint allows your arms to move in practically any direction you want, be it overhead, sideways, forward, back, or any direction in between. |
| Fitted with a ball-and-socket joint for mounting on a tripod, and complete with wooden field case. |
| The hip joint is a ball-and-socket joint because the spherical head of the femur moves inside the cup-shaped acetabulum. |
| Regardless of the chosen system, a primary THA replaces the proximal femur, including the femoral head, and resurfaces the acetabulum, creating a new ball-and-socket joint. |
