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.
isthmus. n, pl-muses or-mi (-maÉª). 1. (Physical Geography) a narrow strip of land connecting two relatively large land areas. 2. (Anatomy) anatomy.a. a narrow band of tissue connecting two larger parts of a structure.b. a narrow passage connecting two cavities. [C16: from Latin, from Greek isthmos ]. (ËÉªs mÉs). n., pl. -musâ¢es, -mi (-mÄ«).. (Physical Geography) a narrow strip of land connecting two relatively large land areas. 2. (Anatomy) anatomy. a. a narrow band of tissue connecting two larger parts of a structure. b. a narrow passage connecting two cavities. [C16: from Latin, from Greek isthmos ]. (ËÉªs mÉs). n., pl. -musâ¢es, -mi (-mÄ«).