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.
The aortic root is located to the right of the right auricle and the superior vena cave and the the left of the pulmonary artery. The aortic root is enclosed within the pericardium, which is a protective sac containing the heart and major arteries. The ascending aorta transports blood upward from the left ventricle of the heart.