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प्रश्न
Describe the structure and working of the human heart.
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उत्तर
The human heart is four-chambered. The two upper thin-walled chambers, Auricle or Atria, and the lower thick-walled chambers ventricles. The chambers are separated by a septum. The two auricles are separated by an interatrial septum and the two ventricles are separated by the interventricular septum.
The right atrium receives deoxygenated blood from different parts of the body through the superior vena cava, inferior vena cava, and coronary sinus. Pulmonary veins bring oxygenated blood from the lungs to the left atrium. Both the right and the left auricles pump blood into the right and left ventricles respectively.
From the right ventricle, the pulmonary arteries supply deoxygenated blood to the lungs. From the left ventricle, the Aorta carries the Oxygenated blood to the various organs of the body. The coronary arteries supply blood to the heart. This process is repeated again and again.
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संबंधित प्रश्न
Explain with the help of a suitable diagram conducting system of human heart.
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The diagram below depicts the human heart in one of its phases. Answer the questions that follow:
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- Give a suitable reason to justify your answer in (a).
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Given below is a diagram of the external features of the human heart. Study the figure and answer the questions that follows:
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- Label the guidelines shown as 1 to 6 in the figure.
- Write the important role of parts 5 and 6.
- Name the chamber of the heart which collects blood from the lungs through a blood vessel. Also write the name of the blood vessel.
- Write one structural and one functional difference between the blood vessels 4 and 5.
- What happens when there is a blockage in any coronary artery or any of their branches?
