Functional groups are defined as specific groupings of atoms or bonds which are part of a larger hydrocarbon chain. It is necessary that you are able to recognize these groups by structure and by name. The ending of the name as a suffix tells the type of compound or functional group present.
[TA] a slight constriction of the aorta immediately distal to the left subclavian artery at the point of attachment of the ductus arteriosus. Synonym(s): isthmus aortae [TA], isthmus of aorta. A constriction in the fetal aorta between the ductus arteriosus and the left subclavian artery.
pl. aortae, aortas [L.] the great artery arising from the left ventricle, being the main trunk from which the systemic arterial system proceeds. See Table 9. See also aortic. abdominal aorta. the part of the descending aorta within the abdomen. ascending aorta. the first part of the aorta which passes dorsally and cranially. descending aorta. the aorta after it turns caudally at the aortic arch. overriding aorta. see overriding aorta. supravalvular aorta. the portion of aorta immediately above the aortic valve. terminal aorta. the segment of the aorta immediately before it divides into the iliac arteries.