human_reference_atlas has part cell of skeletal muscle Homo sapiens extra-ocular muscle http://upload.wikimedia.org/wikipedia/commons/6/61/MRI_of_human_eye.jpg VHOG:0000549 AS extra-ocular muscle BTO:0001579 Muscles surrounding the eye (bulbus oculi) and having an effect on eye movements.[AAO] extrinsic eye muscle The ability to rotate the eyeball is common to all vertebrates with well-developed eyes, regardless of the habitat in which they live, so these (extrinsic ocular) muscles tend to be conservative. They change little during the course of evolution.[well established][VHOG] extrinsic ocular muscle EMAPA:18234 EHDAA:5729 UBERON:0006229 uberon ZFA:0000511 CALOHA:TS-0305 EHDAA2:0000482 FMA:49033 AAO:0010028 Myofibers in extraocular muscles are derived from mesoderm, whereas muscle connective tissue cells arise from neural crest.[PMID:16638982] UBERON:0001601 TAO:0000511 SCTID:181150000 extraocular skeletal muscle extrinsic muscle of eyeball todo - resolve discrepancies in which muscles are considered extra-ocular extraocular musculature Mammals have 7 extra-ocular muscles, but humans lack the M. retractor bulbi. Skeletal muscle derived from cranial mesoderm and controls eye movements. Any of the six small muscles that control movement of the eyeball within the socket. [TFD][VHOG] extraocular muscle Wikipedia:Extraocular_muscles extra-ocular muscle MA:0001271 extra-ocular skeletal muscle BTO and MA consider this part of the eye; we follow them here (inferred from skeletal muscle). Not clear if omission from FMA is deliberate. musculi externi bulbi oculi extraocular EFO:0001921 cranial muscle skeletal muscle organ