The Mouse Adult Gross Anatomy Ontology and Mammalian Phenotype Ontology are downloaded weekly from the Mouse Genome Informatics databases at Jackson Laboratories (ftp://ftp.informatics.jax.org/pub/reports/index.html). For more information about these ontologies, see the MGI Publications Page at http://www.informatics.jax.org/mgihome/other/publications.shtml.
any structural morphology of the elongate recess derived from the first pharyngeal pouch; its distal part contributes to the formation of the tympanic membrane, its proximal part elongates to form the auditory tube, and its cavity gives rise to the tympanic cavity and mastoid antrum