The Respiratory System

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Across
  1. 4. Small tubes in the lungs
  2. 6. A waste product of cellular respiration
  3. 7. Release of energy from sugars
  4. 8. Narrow tubes leading to the lungs
  5. 10. The windpipe
Down
  1. 1. A cold, allergy, or asthma
  2. 2. Enables a high rate of gas exchange
  3. 3. Tissues that vibrate and make sound
  4. 5. Stability between working systems
  5. 9. Gas needed for cellular respiration