Anatomy Patent foramen ovate is due to? A Failure of closure of sinoatrial orifice B Failure of fusion of septum primum and endocardial cushion C Failure of fusion of septum primum and septum intermedium D Failure of fusion of septum primum and septum secundum 💡 Explanation Patent foramen ovate is due to? ✓ Correct Answer: D. Failure of fusion of septum primum and septum secundum