You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is NOT true about right atrium: and explain in detail?
* 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