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 are petals?
- What is insulin?
- What is passive smoking?
- Where does bacteria in faeces come from?
- How is deoxygenated blood pumped to lungs?
- What are proteins and functions?