Across
- 1. Capacity/ The maximum volume of air that a mammal can inhale and exhale with each breath.
- 5. The throat region where the air and food passages cross.
- 7. Pressure Breathing/ A breathing system in which air is pulled into the lungs.
- 9. A fine branch of the bronchi that transport air to alveoli.
- 10. The alternate inhalation and exhalation of air.
- 11. The dead-end air sacs within the lung where gas exchange occurs.
- 12. The windpipe; the portion of the respiratory tube that passes from the larynx to the two bronchi.
Down
- 2. The upper portion of the respiratory tract containing the vocal chords; also called the voice box.
- 3. The sheet of muscle separating the chest cavity from the abdominal cavity.
- 4. Control Center/ The part of the medulla in the brain that directs the activity of organs involved in breathing.
- 6. A substance secreted by alveoli that decreases surface tension in the fluid that coats the alveoli.
- 8. Cords/ One of a pair of bands of elastic tissue in the larynx. Air rushing past the tensed vocal cords make them vibrate, producing sounds.
- 10. Pair of breathing tubes that branch from the trachea into the lungs.