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प्रश्न
Give scientific reason.
Arteries are thicker than veins.
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उत्तर
- Arteries carry oxygenated blood away from the heart to the body.
- The blood pumped out by the heart is under high pressure and to withstand this pressure arteries are thick-walled.
- Veins carry deoxygenated blood from the body back to the heart.
- They are thin-walled as the blood that flows through veins is under low pressure. Hence, arteries are thicker than veins.
- Veins, on the other hand, have thinner walls and a bigger lumen since they do not need to resist high pressure like arteries.
- Furthermore, because veins convey relatively low-pressure blood, they are frequently fitted with valves to promote unidirectional blood flow towards the heart.
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संबंधित प्रश्न
The blood vessel which carries oxygenated blood from the lungs to the heart is:
Differentiate between the following pair of terms:
Vena cava and aorta.
Fill in the blank with suitable word given below:
The colour of a red blood cell is due to _______________.
Answer very briefly, Why should the blood going away from the stomach and intestines pass through the liver and not directly to heart?
Name the organ from which oxygenated blood goes into the heart.
Name the Following
The blood vessel that begins and ends in capillaries.
Complete the following sentence with appropriate words:
The three distinct types of blood vessels are _____, ______, and _________.
Assertion: Veins have thin walls to collect blood from different organs.
Reason: Blood in veins are not under pressure.
Why do veins have thin walls as compared to arteries?
Give reason Arterial walls are thicker than those of veins.
