abnormal descending aorta morphology abnormal abdominal aorta morphology MPheno.ontology MA:0000474 abnormal aorta abdominalis any structural anomaly of the part of the descending aorta that begins at the diaphragm and continues to the point of the common iliac arteries, and supplies oxygenated blood to all of the abdominal and pelvic organs and the legs abnormal pars abdominalis aortae MP:0009870 2009-12-15T11:12:21Z csmith