SA Node is located at: (A) Upper end crista terminalis, (B) Lower end of crista terminalis, (C) At opening of IVC, (D) At ostium primum
Answer is A. SA node is situated at the atriocaval junction in the upper pa of the sulcus terminalis B D CHAURASIA'S HUMAN ANATOMY UPPER LIMB THORAX-VOLUME 1 SIXTH EDITION Page no-262