Circulation-Respiration-Nervous System Crossword Puzzle

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Across
  1. 3. Where do chemists put their dirty beakers? In the ( )
  2. 6. Too much carbon dioxide leaves the blood
  3. 10. Inside red blood cells, carries oxygen
  4. 11. Disease that causes alveoli to disintigrate
  5. 13. Blood vessel that carries blood to the heart
  6. 14. self-propagating change in the voltage across the plasma membrane
  7. 17. Valve between atria and ventricles of heart
  8. 21. Part of the brain that allows learning, emotions, activity, etc.
  9. 25. A chemical that carries information from a neuron to another cell
  10. 26. Lower part of heart that pumps blood
  11. 27. Part of a neuron that relays signals to another neuron or effector
  12. 33. Sheet of muscle that controls inhalation and exhalation in lungs
  13. 34. What did Uranium, Sulfur, Titanium, Nitrogen, and Potassium say to the skunk?
  14. 35. What is the study of real estate?
Down
  1. 1. Layers of protective tissue around brain
  2. 2. Brings blood to heart from upper body
  3. 4. Relaxation phase of heart
  4. 5. Clusters of air sacs, where gas is exchanged with blood vessels
  5. 7. I would tell a joke about chemistry, but all the good ones ( )
  6. 8. Nerve cell specialized for carrying signals from one part of body to another
  7. 9. Upper part of heart that receives blood
  8. 12. Caused by iron deficiency
  9. 15. Brings blood from lungs back to heart
  10. 16. Branched, short, receive incoming messages from other cells
  11. 18. Brings blood to heart from lower body
  12. 19. Copper is leaving a friend’s house. As he was leaving he said ( )
  13. 20. Organs that carry out respiration
  14. 22. Blood vessel that takes blood away from the heart
  15. 23. Brings blood from heart to lungs
  16. 24. interferes with delivery of oxygen to body causing death
  17. 28. Where digestive and respiratory systems meet
  18. 29. Part of the brain that allows balance and coordination
  19. 30. Part of the brain that regulates heartbeat and respiration rate
  20. 31. Tube that expands from larynx to bronchi
  21. 32. Anything that causes a nerve signal to start