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प्रश्न
Why do arteries have thick and elastic walls whereas veins have valves?
उत्तर
The blood emerges from the heart under high pressure and flows through arteries. Hence, to bear this pressure the arteries have thick and elastic walls. Veins have valves to ensure that the blood flows in one direction only.
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संबंधित प्रश्न
State the differences between artery, vein and capillary.
Which one of the following does not have valves?
Fill in the blank with suitable word given below:
The _________ artery takes the blood from the ventricles to the lungs.
Fill in the blank with suitable word given below:
The carbon dioxide loaded blood from right ventricle is pumped into the lungs through _________ artery.
Define the term Arteries.
Name the following:
The study of blood vascular and lymphatic system.
Name the Following
The blood vessels which have valves in them.
Identify the reason because of which the walls of the arteries are thicker than those of veins.
Identify the CORRECT match.
The extracellular fluid released from the capillaries is ____________.
