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.
An isthmus (narrow strip of land). Etymology Via Latin isthmus, from Ancient Greek á¼°ÏÎ¸Î¼ÏÏ (isthmÃ³s, â neck â), possibly from Îµá¼¶Î¼Î¹ (eÃ®mi, â to go â). Cognate to Old Norse eiÃ° (â isthmus â). Pronunciation . IPA : /ËÉªs.mÉs/