Across
- 4. the windpipe
- 7. a pair of spongy, pinkish-gray organs in the chest that are the primary components of the respiratory system.
- 9. the condition in which an organism's internal environment is kept stable in spite of changes in the external environment
- 10. the exchange of gases between the inside and outside of the body
Down
- 1. the process cells use to break down glucose in order to produce energy
- 2. the two passages that direct air into the lungs
- 3. a small filtering structure in the kidneys that removes waste from blood and produces urine
- 5. tiny thin-walled sacs of lung tissue where gases can move between air and blood
- 6. the process of removing wastes
- 8. two bean-shaped organs that filter blood and regulate the amount of water in the body