Anatomy Not true about right atrium ? A Posterior pa is smooth B Anterior pa is derived from absorption of right horn of sinus venosus C Fossa oval i s repressent remnant of foramen ovale D Anterior and posterior pas are divided by Crista terminalis 💡 Explanation Not true about right atrium ? ✓ Correct Answer: B. Anterior pa is derived from absorption of right horn of sinus venosus