Across
- 3. Clusters of air sacs in the lungs
- 5. Voice Box
- 8. Prevent back-flow of blood
- 9. Sends commands to skeletal muscles
- 10. The only vein in the body that carries oxygenated blood
- 13. Lead air to each lung
- 14. relays signals to another neuron or effector
- 15. Windpipe
- 17. The only artery in the body that transports deoxygenated blood
- 18. Purges blood of so much carbondioxide that the brain stops sending messages to diaphram
- 19. Location where digestive and respiratory systems meet
- 20. Bonds better with hemoglobin than oxygen
- 21. Carries blood between heart and rest of body
- 24. Communication line made from bundles of neuron fibers
- 26. Sensory neurons carrying impulses from sense organs to CNS
- 28. Cardiopulmonaresuscitation
- 29. disease that causes alveoli to disintegrate
Down
- 1. Nucleus and other organelles
- 2. Conducts signal toward another neuron or effector
- 4. Rhythmic contraction and relaxation of the heart
- 6. Disease caused by iron deficiency
- 7. Carries blood between heart and lungs
- 8. Lower heart chambers that pump oxygenated blood to certain body organs and tissues
- 11. Diffuse nutrients and oxygen into tissue
- 12. Peripheral Nervous System
- 16. Nerve cell specialized for carrying signals throughout body parts
- 22. chain of beadlike supporting cells
- 23. Receive incoming messages from other cells or the environment
- 25. Smaller branches in each lung that transport air
- 27. The largest blood vessel
- 30. Separates oxygenated blood from deoxygenated blood