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प्रश्न
Describe, in brief, the circulatory system in human beings.
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उत्तर
The circulatory system in human beings consists of heart, blood vessels (arteries, veins and capillaries) and blood. Blood circulates throughout the body in blood vessels by the pumping action of the heart. The impure blood is carried by veins from all parts of the body to the heart. The heart pumps it into the lungs where blood is oxygenated and carried back to the heart. From heart, the oxygenated (pure) blood is pumped to all parts of the body through arteries.
Thus, the circulatory system forms the transport system carrying food, oxygen, waste products, nutrients etc. throughout the body.
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संबंधित प्रश्न
The blood from the heart is transported to all parts of the body by the ______.
Given below is a certain structure, write its chief functional activity.
Bone marrow - ______.
A blood vessel which has small lumen and thick wall is ______.
Differentiate between members of the following pairs with reference to the aspect asked
within bracket:
Erythrocytes and leucocytes (function)
The table below is designed to indicate the transport of certain substance in our body. Fill in the
blanks with suitable answers.
| Substance | From | To |
| Lungs | Whole body | |
| Carbon dioxide | ||
| Urea | ||
| Digested carbohydrates |
Intestines | |
| Target organs |
Describe how the exchange of oxygen and carbon dioxide gases takes place in the lungs.
Respiration takes place because of its up and down movement.
All the waste products of the body are excreted through the circulatory system.
______ is a granulocyte.
Which of the following is the main site of erythropoiesis in adults?
