Topic: Food Energy and Respiration Subtopic: How we breathe?
What happen when we exhale?
Answer: When we exhale, the diaphragm muscles move upwards and the rib cage is pushed downwards and inwards. This decreases the volume of lungs, forcing the air out of the lungs.
- What is digestive system?
- What is cell sap?
- What happens if less oxygen is absorbed in blood?
- What are root hairs?
- What is deoxygenated blood?
- What is job of xylem?