tendon http://upload.wikimedia.org/wikipedia/commons/3/3c/Achilles-tendon.jpg Wikipedia:Tendon Dense regular connective tissue that connects muscle to bone[VSAO]. BTO:0001356 CALOHA:TS-1021 MESH:D013710 ZFA:0005647 Phylogenetically, tendinous tissue first appears in the invertebrate chordate Branchiostoma as myosepta. This two-dimensional array of collagen fibers is highly organized, with fibers running along two primary axes. In hagfish the first linear tendons appear and the myosepta have developed specialized regions with unidirectional fiber orientation - a linear tendon within the flat sheet of myoseptum.[well established][VHOG] VSAO:0000073 sinew Dense regular connective tissue that connects muscle to bone.[VSAO] SCTID:256667004 EMAPA:35854 EHDAA2:0003091 XAO:0000173 tendo GAID:276 EV:0100149 UMLS:C0039508 galen:Tendon FMA:9721 in FMA, tendon is an organ component that with parts dense-irregular-connective-tissue of tendon and dense-irregular-connective-tissue of tendon sheath; we follow VSAO in making it a subtype of the former. In VSAO tendons connect muscle to bone; in WP the def states integument (e.g. auricular muscles) - but JB confirms this is not actually tendon but aponeurosis UBERON:0000043 MA:0000115 NCIT:C13045 VHOG:0001286 AEO:0000091 dense regular connective tissue