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 could be an example of diffusion?
- What is pulse?
- Where is blood taken after lungs?
- Where does bacteria in faeces come from?
- What is sequence of mineral and water transport?
- What is meant by word extinct?