Heart
PRACTICAL EXERCISE 4
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 with closure of the pulmonary and aortic valves (semilunar valves) at the beginning of diastole. There is a pause between the each set of sounds. It is a period of total heat relaxation called quiescent period.
Q.2 Which structures are responsible for these sounds?
If these structures were damaged or functionally incorrectly, what do you think would happen to the heart sound?
The structures responsible for these sounds are: pulmonary, aortic and atrioventricular valves. These sounds are results of......
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