Question

A. Name the following:
1. It is present in the blood that combines with oxygen and carries it to all parts of the body. ____________
2. Aquatic animals breathe through this. _______________
3. It is present on the head of dolphins to help them breathe. _______________
4. An earthworm breathes through this. ________________
5. Frogs breathe through them when they are on land. ______________
6. Human beings use their limbs to walk, stand and run. _____________
B. Answer the following questions in brief.
1. Define ‘breathing’
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2. Name two animals which breathe through their skins.
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3. Define ‘migration’.
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5. Mention two features of birds that help them to fly.
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6. Describe the movement of fish in water.
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C. Give reasons for the following:
1. The deer is not easily visible in the forest.
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2. Whales and dolphins come to the surface of water to breathe.
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3. Kangaroos hop on their hindlimbs.
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4. Most of the birds can fly but penguins cannot.
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Answer 1

Answer:

A 1.A protein called haemoglobin in the red blood cells then carries the oxygen around your body. At the same time, carbon dioxide that is dissolved in the blood comes out of the capillaries back into the air sacs, ready to be breathed out.

A2. lungs