Across
- 2. long fiber that conducts signals towards another neuron or effector
- 5. Clusters of tiny air sacs in the lungs
- 10. Name of heart relaxation phase
- 11. Prevents backflow of blood
- 13. High blood pressure
- 15. Also known as the SA node, sets the tempo of the heartbeat
- 16. Circulatory system belonging to invertebrates, mollusks, arthropods
- 17. Name of protein found in plasma
- 19. Chemical that carries information from one neuron to another type of cell that will react
- 21. Main passageway to lungs
- 23. Tubes that branch from the trachea and lead to each lung
- 25. Thin-walled heart chamber that receives blood
Down
- 1. Anything that causes a nerve signal to start
- 3. Lack of ______ allows for more hemoglobin
- 4. When the diaphragm ______, air is pulled into the lungs
- 6. Name of red blood cells
- 7. Circuit that carries blood between heart and rest of body
- 8. Color of deoxygenated blood
- 9. Circulatory system belonging to vertebrates, earthworm, octopus
- 12. Disease that causes alveoli to disintegrate
- 14. Adrenaline hormone released during stress
- 18. Circuit that carries blood between heart and lungs
- 20. Nerve cell specialized for carrying signals
- 22. Nervous system that includes brain and spinal cord
- 24. Number of heart chambers an Amphibian has