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 is aerobic respiration?
- What gas is present in cigarette?
- What is diarrhea?
- What are red blood cells made up of?
- Where does respiration take place?
- What happens when atria are full of blood?