Across
- 3. collection of organs whose primary function is to take in oxygen and expel carbon dioxide
- 4. the part of the respiratory system between the pharynx and the trachea
- 5. thin-walled tubed that extends from the larynx to the bronchi
- 6. the part of the respiratory system that extends from the mouth to the larynx
- 8. in biology, a vessel that carries blood to the heart
Down
- 1. any of the major air passages of the lungs that diverge from the windpipe
- 2. a tiny blood vessel that allows an exchange between blood and cells in tissue
- 7. any of the many tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide takes place