Topic: Food Energy and Respiration Subtopic: Making the air moist, warm and clean
Why is it better to breathe through nose?
Answer: Our nose contains hair that can trap dust particles and germs that are harmful for our health. When we breathe through mouth, there are no hair present within the oral cavity, so there are more chances of germs and dust particles entering the lungs.
- What is pulse?
- What are carbohydrates and functions?
- What is self-pollination?
- How does temperature affect rate of transpiration?
- Where are red blood cells made?
- What is absorption?