About the right atrium, which of the following descriptions are correct?
A.It can be divided into the atrium proper (固有心房) and the sinus venarum cavarum (腔静脉窦). B.It pumps the venous blood to the right ventricle through the right atrioventricular orifice. C.It forms the right border of the heart. D.It has 3 inlets:orifice of superior vena cava (上腔静脉口), orifice of inferior vena cava, and orifi E.The fossa ovalis is located on its posteriomedial wall.正确答案ABCDE
