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.
- What is thrombosis?
- What is treatment of faulty pacemaker?
- How minerals salts are taken up?
- What is transpiration?
- What is bronchus?
- What happens after exchange of substances?