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प्रश्न
What are heart sounds? How are they produced?
उत्तर
The rhythmic closure and opening of the valves cause the sound of the heart. When the closure of the tricuspid and bicuspid valves after the beginning of ventricular systole, the sound ‘LUBB’ is produced. When the closure of the semilunar valve at the end of ventricular systole, the sound ‘DUPP’ is produced.
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संबंधित प्रश्न
The rhythmic expansion and contraction of the heart is called ______.
What is meant by 'heart beat'? What is the usual heart beat rate at rest?
Why do we sweat more in summer?
Initiation and stimulation of heartbeat take place by nerves.
The closure of the mitral and tricuspid valves at the start of the ventricular systole produces the first sound ‘LUBB’.
Differentiate between systole and diastole.
Doctors use the stethoscope to hear the sound of the heart. Why?
What is the pulse rate?
Observe Figure 11.2 and answer the given questions:
(a) Name the instrument.
(b) Label parts A, B and C.
The 'Lub' and "Dub" heart sound are due to ______.
