The Respiratory System

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Across
  1. 2. A muscle that helps you breathe by moving up and down.
  2. 4. The waste gas your body breathes out.
  3. 7. Smaller branches of the bronchi that carry air deeper into the lungs.
  4. 8. The windpipe that carries air from the mouth and nose to the lungs.
  5. 10. A device you use it smell with
  6. 11. Small blood vessels that surround the alveoli and carry gases to and from the blood.
Down
  1. 1. The process where gases move from an area of high concentration to low concentration.
  2. 3. Organs where gas exchange happens.
  3. 5. The gas you breathe in that your body needs for energy.
  4. 6. Tiny air sacs in the lungs where gas exchange takes place.
  5. 7. Two main airways that branch from the trachea into each lung.
  6. 9. Bones that protect the lungs and other organs in the chest.