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.
Learn also:
- What is thrombosis?
- How is starch processed?
- Why are walls of left ventricle stronger?
- What are minerals and functions?
- What is absorbed in large intestine?
- What plants do if water intake is less?