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प्रश्न
Why does the heart need valves?
उत्तर
The heart needs valves to regulate the flow of blood. It allows the blood to flow through the heart only in one direction.
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संबंधित प्रश्न
Name largest vein, in our body.
A blood vessel which carries blood back to the heart is:
Differentiate between the following pair of terms:
Pulmonary artery and pulmonary vein.
Fill in the blank with suitable word given below:
The blood plasma contains a dissolved substance called ______________.
Why is a person having blood group AB called universal recipient and a person with blood group O called a universal donor?
Given below is a diagrammatic representation of certain types of blood vessels in human body.
Where can such an arrangement be found as an example - in lungs or in heart walls?
Name the Blood vessels entering liver and kidney and Blood vessels leaving liver and kidney.
Name the Following
The fine blood vessels in the tissues through which exchange of materials occurs
Complete the following sentence with appropriate words:
Arteries are _____ walled and the veins are _____ walled vessels.
Why do arteries have thick and elastic walls whereas veins have valves?
