A 3-day-old boy delivered at 32 weeks of gestation is experiencing respiratory distress syndrome. The physician detects a hea murmur characteristic of a patent ductus aeriosus, a diagnosis that is confirmed with an echocardiogram. Which embryonic structure is involved in this diagnosis?
C. Patent ductus aeriosus (PDA) is a condition in which the ductus aeriosus, a bloodvessel that allows blood to bypass the baby's lungs before bih, fails to normally close afterbih. The ductus aeriosus is derived from the distal poion of the left sixth aoic arch
Left third aoic arch
Right third aoic arch
Left sixth aoic arch
Umbilical aeries
CVS Embryology