Respiratory System

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Across
  1. 4. the trachea is also called the _________
  2. 5. When you exhale, your lungs ______
  3. 6. As you breathe, this contracts and flattens to give your lungs room to fill up with air _________
  4. 7. When you inhale, air enters your lungs, and ______ from that air moves to your blood
Down
  1. 1. What is the name of the tiny air sacs in your lungs?
  2. 2. _________ is not good for your lungs
  3. 3. Your body couldn’t breathe without this system. Which system is it?
  4. 5. The respiratory system is made up of the trachea, the lungs, and the ______