The shoulder and hip joints are both ball and socket joints ... one bone that fits into a small cup-like area of another bone. Hinge joint. Articulating bones are femur and tibia (the patella ...

Flexion of the shoulder joint occurs when the humerus (upper arm) moves forwards from the rest of the body, which happens at the end of an underarm throw or bowl in rounders. Flexion of the hip ...

Basically, "dislocation" means that the bones that form the joint have slipped out of their normal position in the joint. A joint can become dislocated if you injure yourself. Sometimes ...