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.
less than the expected number of the incomplete C- or U-shaped rings of hyaline cartilage that support the trachea and prevent it from collapsing
Comment:
The rodent trachea contains C-shaped incomplete cartilaginous rings that vary in number between mice (15-18) and rats (20-25). A total of 15-20 incomplete U-shaped cartilaginous rings support the human trachea. {xref="ISBN:978-0-12-802900-8"}
Synonyms:
exact_synonym:
reduced tracheal cartilage ring number; reduced tracheal ring number