Topic: Food Energy and Respiration Subtopic: Introduction
How does air enter our lungs?
Answer: When we exhale, there is a pressure difference inside and outside of the lungs. To maintain that pressure air enters the lungs.
- What happens to excess glucose in diabetic person?
- What is hemophilia?
- What is mechanical process in digestion?
- Where does bacteria in faeces come from?
- What is self-pollination?
- What is cross-pollination?