Across
- 2. upon inhalation it contracts and the chest cavity expands upon exhalation it relaxes and rests
- 4. The heart then sends the blood to the lungs to pick up more oxygen.
- 5. carries oxygen to the lungs
- 7. help form and move the chest wall
- 9. lets air pass through your throat to your trachea
- 11. carry air to small sacs in your lungs called alveoli.
Down
- 1. keeps the pleura moist and reduces friction between the membranes when you breathe.
- 3. allow optimal expansion and contraction of the lungs during breathing.
- 6. 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.
- 8. where gas exchange takes place
- 10. protects the organs in the thoracic cavity, assists in respiration, and provides support for the upper extremities.