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 anomaly of the fluid-filled spaces formed within the mass of extraembryonic mesoderm that later fuse to become a large extraembryonic cavity
Comment:
Note that there is a great deal of confusion in the literature regarding the term exocoelomic cavity. It is frequently and erroneously used as a synonym for primary yolk sac cavity.