The tendons are mainly composed of three parts: the tendon itself, the muscle-tendon junction, and the bone insertion. Tendons generally have a very complex structure they are actually heavily composed of connective tissue and have a small number of cells and rich extracellular matrix, similar to other connective tissue structures. Tendons play an important role in the movement by transmitting the contraction force produced by the muscles to the bone they hold, and their contribution to stability to the joints is extremely important.
