tendon

a tough and inelastic white cord, composed of bundles of COLLAGEN fibres, that attaches a MUSCLE to a BONE . A tendon concentrates the pull of the muscle onto one point on the bone, and the length and thickness vary considerably. The fibres of a tendon pass into, and become continuous with, those of the bone it serves. Many tendons are enclosed in tendon sheaths lined with SYNOVIAL MEMBRANE containing synovia, which reduces friction and enables easy movement to occur.