Foramen ovale closes because of fusion of: (A) Septum primerm + Endocardial cushion, (B) Septam serunsum + Endocardial cushion, (C) Septum primerm + Septam serunsum, (D) None
Answer is C. The septum primerm and septum secundum press againest each other close the communication (forman ovale) between the two arteria, complited at around 3 months after birth.