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Title: Which of the following events result in the first heart sound? Post by: colleen on Nov 5, 2013 Which of the following events result in the first heart sound?
A) The AV valves open. B) The AV valves close. C) The semilunar valves close. D) The semilunar valves open. E) The atria contract. Title: Re: Which of the following events result in the first heart sound? Post by: nite_n_day on Nov 6, 2013 Content hidden
Title: Re: Which of the following events result in the first heart sound? Post by: colleen on Nov 6, 2013 Wonderful :D :D
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