Across
- 4. system Your body couldn't breathe without this system.Which one is it ?
- 5. When You inhale ,you lungs?
Down
- 1. What is the name of the tiny sacs in your lungs ?
- 2. The respiratory system is made up of the trachea ,the lungs ,and the?
- 3. dioxide When you breath in air,you bring oxygen into your lungs and blow out ?