respiratory system

12345678910
Across
  1. 2. The heart then sends the blood to the lungs to pick up more oxygen.
  2. 7. help form and move the chest wall
  3. 9. allow optimal expansion and contraction of the lungs during breathing.
Down
  1. 1. upon inhalation it contracts and the chest cavity expands upon exhalation it relaxes and rests
  2. 3. where gas exchange takes place
  3. 4. carry air to small sacs in your lungs called alveoli.
  4. 5. protects the organs in the thoracic cavity, assists in respiration, and provides support for the upper extremities.
  5. 6. carries oxygen to the lungs
  6. 8. lets air pass through your throat to your trachea
  7. 10. allow oxygen in the air to be taken into the body, while also letting the body get rid of carbon dioxide in the air breathed out.