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.
absence of the membrane formed by the paired folds that grow out from the lateral part of the body wall; the folds fuse and meet with the dorsal and ventral mesentery of the foregut, separating the pleural cavities from the pericardial cavity