system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
NOT true about right atrium:
assistant
The correct answer is  * Anterior (rough) pa of right atrium is derived from primitive atrium. * Posterior smooth pa (sinus venarum) is derived from absorption of right horn of sinus venosus. * Crista terminalis is the boundary line between the rough and smooth pas. On outer surface this demarcation is known as sulcus terminalis * Fossa ovalis represents remnant of foramen ovale * limbus fossa ovalis is remnant of septum secundum