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प्रश्न
The rhythmic expansion and contraction of the heart is called ______.
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उत्तर
The rhythmic expansion and contraction of the heart is called heartbeat.
Explanation:
The heartbeat ensures the continuous flow of blood, delivering oxygen and nutrients to the body while removing waste products.
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संबंधित प्रश्न
What is meant by ‘heart beat’?
The closure of the mitral and tricuspid valves at the start of the ventricular systole produces the first sound ‘LUBB’.
What are heart sounds? How are they produced?
Differentiate between systole and diastole.
Doctors use the stethoscope to hear the sound of the heart. Why?
What is the pulse rate?
Explain the process of breathing in man.
Match the parts of the heart in Column I with the direction of flow of blood in Column II.
| Column I | Column II | ||
| (i) | Right ventricle | (a) | Pushes blood into the pulmonary artery. |
| (ii) | Pulmonary veins | (b) | Take deoxygenated blood from the heart to the lungs. |
| (iii) | Left atrium | (c) | Receives blood from different parts of the body. |
| (iv) | Pulmonary arteries | (d) | Bring oxygenated blood from the lungs to the heart. |
| (v) | Left ventricle | (e) | Pushes blood into the aorta. |
| (vi) | Right auricle | (f) | Receives deoxygenated blood from the pulmonary veins. |
The 'Lub' and "Dub" heart sound are due to ______.
What is pulse?
