<prompt> Base of the heart is formed by:RARVLALV  <response>: Ans. C LARef: BDC, 6th ed. vol. I pg. 253; Snells Anatomy, pg. 137 Right ventricle is located between RA and LV. It doesnt form any boundary of heart Right atrium forms the right border Left atrium is located posteriorly. Forms the base of heart Left ventricle forms the left border. Apex is formed by LV. 