Respiratory System
Across
- 4. Located within the thoracic cavity and protected by the sternum, ribs and vertebral column
- 7. The respiratory system is a biological system consisting of specific organs and structures used for gas exchange in animals and plants
- 10. Each bronchus subdivides into smaller branches called bronchioles
- 12. Involuntary or smooth muscle that contracts and always relaxes to aid breathing
Down
- 1. the movement of substances from a high to low concentration through a semi-permeable membrane
- 2. Cup shaped sacs found at the end of bronchioles
- 3. Where the back of the mouth and nose meet
- 5. by capillaries, they provide the site for continual exchange of 02 and CO2
- 6. Where the air enters the respiratory system
- 8. 2 tubes that provide air to the lungs
- 9. Assists with air delivery. Also known as windpipe
- 11. Produces sound when air passes over the larynx