HEART STRUCTURE AND CIRCULATION Q.1 Describe the heart sounds you hear. Explain the origin of two sounds. Two heart sounds are normally heard through a stethoscope on the chest wall, lab dap. The first sound can be described as soft, but resonant, and longer then the second one. This sound is associated with the closure of AV valves (atrioventricular valves) at the beginning of systole. The second sound is louder and sharp. It is associated …showed first 75 words of 1035 total…

…showed last 75 words of 1035 total…pressures in the right ventricle and pulmonary arteries are considerably lower then those in the left side of the heart. References: Martini, F.H. (1998). Fundamentals of Anatomy and Physiology. (4th ed.). New Jersey: Prentice Hall, Inc. Simon & Schuster A Viacom Company Marieb, E.N. (1995). Human Anatomy and Physiology. (3rd ed.). California: The Benjamin Cummings Publishing Martini, F.H., & Bartholomew, E.F. (1997). Essentials of Anatomy & Physiology. New Jersey: Prentice Hall, Inc. Simon & Schuster A Viacom Company