About the fossa ovalis, which of the following descriptions are correct?
A.It is located on the posteriomedial wall of left atrium. B.It is the thinnest part of the interatrial septum. C.It is a foramen in fetus ovale foramen in fetus ( 胎儿) called the foramen ovale. D.If the foramen ovale can not been closed in child, it is one of congenital heart disease (先天性心脏 E.All of above descriptions are correct.正确答案BCD
