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प्रश्न
Describe the structure and working of the human heart.
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
Name any four heart conditions that occur commonly.
Fill in the blank.
In human body, heart is located on the _____ side of the chest cavity.
The diagram given below represents the human heart in one phase of its activity. Study the same and then answer the question that follow:
How many valves are closed in this phase?
Short answer question.
Describe valves of human heart.
Blood is pumped by
Match the items given in Column I (Valves) with those in Column II (Location) and select the correct option.
| Column I | Column II | ||
| i. | Tricuspid valve | a. | Between left atrium and left ventricle |
| ii. | Bicuspid valve | b. | Between right ventricle . and pulmonary artery. |
| iii. | Semilunar valve | c. | Between right atrium and right ventricle |
Heart is made up of ______.
The walls of the heart is made up of ______.
In which of the following parts of the human body are sweat glands absent?
The diagram below depicts the human heart in one of its phases. Answer the questions that follow:
- Which part of the heart is in the contraction phase?
- Give a suitable reason to justify your answer in (a).
- Distinguish between Systole and Diastole.
