NCERT Class VII Science Solutions: Chapter 11-Transportation in Animals and Plants Part 5

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Question 11:

Describe the function of the heart.

Answer:

The heart is an organ which beats continuously to act as a pump for the transport of blood, which carries other substances with it. The heart pumps the deoxygenated blood to the lungs for oxygenation and receives oxygenated blood from lungs. It pumps the oxygenated blood to different parts of the body.

As showing in Image is a Result for heart

Result for Heart

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Question 12:

Why is it necessary to excrete waste products?

Answer:

When our cells perform their functions, certain waste products are released. These are toxic for our body and hence need to be removed from the body.

Question 13:

Draw a diagram of the human excretory system and label the various parts.

Answer:

Images for human excretory system

Human Excretory System

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