Respirtaory system

12345
Across
  1. 4. system Your body couldn't breathe without this system.Which one is it ?
  2. 5. When You inhale ,you lungs?
Down
  1. 1. What is the name of the tiny sacs in your lungs ?
  2. 2. The respiratory system is made up of the trachea ,the lungs ,and the?
  3. 3. dioxide When you breath in air,you bring oxygen into your lungs and blow out ?