The membranous pa of the atrioventricular pa of interventricular septum is between: (A) RA & LV, (B) LA & RV, (C) RA & RV, (D) LA & LV
Answer is B. Inderbir Singh&;s Human embryology; Tenth edition; Pg 244The membranous pa of the interventricular septum is divisible into an anterior pa which separates the right and left ventricle and a posterior pa which separates the left ventricle from the right atrium ( also called interventricular septum).