Key Stage 3
- To breath the lungs must be able to take in new air and release the old air.
- When the lungs take in air this is called inhalation.
- When the lungs get rid of old air this is called exhalation.
|An animation of the lungs inhaling and exhaling.|
|The percentage of different gases found in inhaled air.|
|The percentage of different gases found in exhaled air.|