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प्रश्न
The diagram below represents a certain category of blood vessels showing the role of a special structure in their walls :
(i) Name the kind of blood vessels shown.
(ii) What is the structure shown inside the blood vessels?
(iii) What is the role of these structures?
(iv) Are these structures present in any other kind of blood vessel? If so, name it.
(v) Towards which side of the figure (Top or Bottom) is the heart located?
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उत्तर
(i) Veins.
(ii) Pocket valves.
(iii) These structures maintain the flow of blood in one direction only by preventing its back¬flow.
(iv) Yes. These are present in lymph vessels.
(v) The heart is located towards the top side of the figure.
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संबंधित प्रश्न
What are the upper parts of the heart called?
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Choose the Odd One Out:
Multiple Choice Questions
Arteries are:
Why can you feel a pulse when you keep a finger on the wrist or neck but not when you keep them on a vein?
A blood vessel which pumps the blood from the heart to the entire body:
Why do arteries have thick and elastic walls whereas veins have valves?
