Arthrology is a term that refers to the study and classification of joints of the body and how the joints contribute to the articulation (movement) of the various parts of the body.

Joints are located between bones. They can be thought of as the functional junction of the bones. For example, the position of the elbow and its ability to assume different positions makes possible a great range of motions in the arms. Without an elbow, an arm would be capable of only a rigid motion originating at the shoulder. With the articulation power of the elbow, however, an arm can be simultaneously lifted vertically and the lower arm can be turned at a right angle to the vertical movement.

Joints also allow for the alteration and expansion of bone during childhood development and growth, and permit the body to link muscular contraction to movement. Using the elbow...