Patent formen ovale is due to failure of fusion of?: (A) Ostium primum with Endocardial cushion, (B) Ostium primum with Ostium Secundum, (C) Ostium primum with Septum primum, (D) Septum primum with septum secundum
Answer is D. D i.e. Septum primum with septum secundumUnequal division of conus Gordis resulting from anterior displacement of conotruncal septum gives rise to Fallot's tetralogyQ.- Ligamentum teres hepatis is remnant of umbilical vein (left)Q and ligamentum aeriosum in adult is remnant of ductus aeriosusQ.Patent foramen ovale is d/t failure of septum primum with septum secundumQ.