This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pericardium & Heart, Subject name: Anatomy
Crista terminalis is present in - 
Select and explain. 
A. Left atrium, B. Left ventricle, C. Right atrium, D. Right ventricle
C: Right atrium
Answer: C: Right atrium 
Explanation: Ans. is 'c' i.e., Right atrium o Crista terminalis (divides the right atrium into anterior and posterior part) is a ridge of smooth muscle fibers extending from the SVC to valve of IVC.o It is developed from embryonic right venous valve and is represented on the surface by sulcus terminalis.