Topic: Food Energy and Respiration Subtopic: Making the air moist, warm and clean
Why we should not breathe through mouth?
Answer: Mouth does not contain mucus, blood vessels near the surface or hair that could trap the dust particles or germs.
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- What are harmful effects of carbon dioxide?
- What is self-pollination?
- How many parts does flower has?
- Why are Villi essential?
- What is deoxygenated blood?
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