joint

Joints come in 2 main types: - Hinge (allows movement back and forth) - Ball and Socket (allows movement in all directions) Both move can freely in their repective paths of movement, provided nothing gets in the way. Joints are generally found in one of 2 instances: in the body, or in general (non-biological) terms. 1) An area at the end of 2 bones where muscle tissue connects to create a moveable part (biological joint). This could be a finger (hinge) or possibly a shoulder (ball and socket), among other things. 2) Any connection between 2 objects that allows movement. This could be found on a door's hinge (hinge) or a trailer hitch (ball and socket), and more.