Respiratory System

Edit Answers
123456789101112
Across
  1. 2. large tubes that branch off the trachea and bring oxygen into each lung
  2. 3. small sacs in lungs that allow the carbon dioxide and oxygen exchange
  3. 4. maximum volume of air a person can breathe out after breathing in fully
  4. 6. gas that we breathe out or exhale
  5. 7. system that works closely with respiratory system to bring oxygen into blood
  6. 9. allows for oxygen and carbon dioxide to move from higher concentrations to lower concentrations
  7. 11. system that brings oxygen into the body and removes carbon dioxide
  8. 12. flat, sheetlike muscle that functions in breathing
Down
  1. 1. number of times per minute that a person breathes in and out
  2. 5. also known as the windpipe
  3. 8. volume of air a person breathes in and out in normal breathing
  4. 10. gas that we breathe in or inhale