Muscle Connector is a term used to describe the three structures that connect muscles to bones. Tendons, sinews, and ligaments are all types of muscle connectors. Tendons are tough bands of fibrous connective tissue that attach muscles to bones. Sinews are similar to tendons but are more flexible and are found in areas such as the neck and back. Ligaments are also connective tissues that attach bones to other bones. They are more elastic than tendons and sinews and provide stability to joints.