Heart sounds are loudest for S1 at the ______ and S2 at the _____.

Choice A rationale The right side of the heart is not specifically associated with the loudest heart sounds for S1 or S213. Choice B rationale The center of the heart is not specifically associated with the loudest heart sounds for S1 or S213. Choice C rationale The apex of the heart is where S1 is loudest. S1 is caused by the closure of the mitral and tricuspid valves and is best heard at the apex. Choice D rationale The base of the heart is where S2 is loudest. S2 is caused by the closure of the aortic and pulmonic valves and is best heard at the base. Choice E rationale The left side of the heart is not specifically associated with the loudest heart sounds for S1 or S213.