The Respiratory System

123456789
Across
  1. 2. What your rib and diaphragm muscles do when you breathe out
  2. 5. Very thin, small vein
  3. 6. Distance between alveoli and blood in capillaries around them
  4. 7. What your rib and diaphragm muscles do when you breathe in
  5. 8. Process to bring air in and out of your lungs
  6. 9. What your cells need to release energy
Down
  1. 1. Tiny air-filled sacs connected to bronchioles
  2. 3. Tiny tube like passageways that end in alveoli
  3. 4. A series of tube-like passageways
  4. 5. What your cells need to get rid of
  5. 8. Brought to your oxygen by the respiratory system
  6. 9. Second(s) it takes blood to travel through your lungs