Now that Appu and Bholu had learned about the different types of blood vessels, they were curious to know how the flow of blood was maintained in these vessels. The doctor said it is maintained by a pump; Appu couldn’t understand what the doctor was trying to say. The doctor asked them to look at the diagram carefully.

They noticed something in the diagram which they had overlooked earlier. What could have they noticed __ ?

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Solution

It’s the heart! The heart beats continuously in a rhythmic manner to pump blood across the body. Arteries carry blood away from the heart and the veins pour blood into the heart. The pressure of blood in arteries is more than in veins

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