The right atrium
A
Is anterior to the right pulmonary veins
B
has the sino-atrial node in its wail
C
Is derived in part from the sinus venosus
D
Forms most of the anterior surface of the heart
E
Contains papillary muscles
Correct Answer: Is anterior to the right pulmonary veins, has the sino-atrial node in its wail, Is derived in part from the sinus venosus