The Clinical Measurement Ontology (CMO), Measurement Methods Ontology (MMO), and Experimental Condition Ontology (XCO) are currently being developed at the Rat Genome Database. For more information about these vocabularies please see Shimoyama et al. Three ontologies to define phenotype measurement data. Front Genet. 2012;3:87. Epub 2012 May 28 or contact us (http://rgd.mcw.edu/contact/index.shtml).
Any measurement of the fibrous and muscular structure of one of the large blood vessels carrying blood in a direction away from the heart to the tissues. The wall of an artery is composed of three layers: the tunica intima, the inner coat; the tunica media, the middle coat; and the tunica adventitia, the outer coat.