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.
a slight constriction of the aorta immediately distal to the left subclavian artery at the point of attachment of the ductus arteriosus. aortic isthmus. A constriction in the fetal aorta between the ductus arteriosus and the left subclavian artery. The condition sometimes persists into adulthood.
The aortic arch, arch of the aorta or the transverse aortic arch (English: / eÉª Ë ÉËr t Éª k /) is the part of the aorta between the ascending and descending aorta. The arch travels backward, so that it ultimately runs to the left of the trachea