Respiratory Sytem

4. separates the thoracic cavity from the abdominal cavity and controls breathing
7. small flap that covers the larynx during swallowing
8. the windpipe, made of cartilaginous rings to keep it open at all times
10. voice box that contains the vocal chords which allow animals to make sounds
11. tiny wavelike hairs that line the nasal cavities and filter air of dirt and particulate matter
12. the use of a stethoscope to listen to internal structures of an animal (e.g. lungs, heart, GI tract)
14. small grape-like clusters at the end of the bronchioles within the lungs, the site of gas exchange in mammalian lungs
15. a colorless, odorless gas that is taken into an animal's body to be utilized during the process of cellular respiration

1. lack of oxygen
2. muscles found between the ribs that assist with respiration
3. the chest cavity that contains the heart and lungs
5. passageway at the back of the throat that is shared by the digestive and respiratory tracts
6. difficulty breathing
9. a colorless, odorless gas that is released from the animal as a by product of cellular respiration
13. when an animal stops breathing