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 happen when we exhale?
- How does humidity affect rate of transpiration?
- What are proteins and functions?
- What are carbohydrates and functions?
- What are fats and functions?
- What are companion cells?