A joint (lat. articulatio / junctura) is a transition between two bones where movement is possible. This is an intermittent connection.
Bones in different ways with each other. It is possible that bones stuck together through such means as cartilage, connective tissue or are completely fused. The latter is the case in the skull. In this case we speak of a continuous connection.
The bones in a joint are held in place by so-called ligaments (ligaments). A band consists of very stiff connective tissue, so that forces are captured. Other structures that help to reinforce and protect joints can occur in such a meniscus (knee), a disc (eg intervertebral disc) and a bursa (bursa, such as shoulder and elbow).
Injuries often occur because a certain auxiliary structures damaged by overloading of a joint. Examples include the rupture of a ligament (eg ligament or ankle), damage to the meniscus, or inflammation of a bursa.