lungs

Anmerkungen:

• help you to breath and exahles carbon dioxide and inhales oxygen

1. alveoil

   Anmerkungen:

   • oxygen enters the blood and is taken to the cells here. this is called gas exchange
2. oxygen

   Anmerkungen:

   • the gas that we need to make energy
3. carbon dioxide

   Anmerkungen:

   • the gas that is exhaled
4. ribs

   Anmerkungen:

   • they porect the lungs and other imporatm oragns