Q1.What are some illnesses which can affect the respiratory system?
Ans: Lung cancer, cold
Q2.Why is it bad to breathe through the mouth for too long?
Ans: There is no hair in our mouth to block the dust and other harmful materials from entering our lungs.
Q3. When he has respiratory problems.
Q4. No, they need oxygen to respire
Q5. To provide space for air to enter
Q6. Compare the ways in which nutrients, water and oxygen are transported within plants and humans.
Ans: They are transported by veins in the plants and the same way in humans.
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