The main features of tendon anatomy are described. From the clinical viewpoint, the most significant are those relating to connective tissue layers surrounding tendons: the paratenon and the synovial (tendon) sheath, and the sources and sites of blood supply. These aspects of tendon anatomy are interactive in the healing process, which requires continuation of blood supply into the tendon while avoiding functionally inhibiting adhesions in the connective tissue. Surgical methods of tendon repair and techniques for achieving successful postoperative results are reviewed.