Circulation, Respiration, and Nervous System Crossword

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Across
  1. 5. returns blood back into the heart
  2. 6. cancer one of the deadliest forms of cancer
  3. 10. circuit that carries blood between the heart and the lungs
  4. 12. divison prepares the body for intense, energy-consuming activities
  5. 14. carries blood away from the heart
  6. 18. pressure a type of breathing when air rushes in through your mouth and nostrils toward the region of lower pressure
  7. 19. special region of the heart that sets the tempo of the heartbeat
  8. 20. the alternating processes of inhalation and exhalation
  9. 21. bits of cytoplasm pinched off from larger cells in the bone marrow
  10. 24. where the digestive and respiratory systems meet
  11. 25. circulatory system in which blood is confined to vessels and is distinct from the intersitial fluid
  12. 27. circulatory system in which the circulating fluid is pumped through open-ended vessels and flows out among the cells
  13. 28. potential the voltage across the plasma membrane of a resting neuron
  14. 30. part of brain that controls breathing
Down
  1. 1. cord a gelatinous bundle of nerve fibers that lies inside the spinal column
  2. 2. the movement of molecules along a concentration gradient, from an area of higher concentration to lower concentration
  3. 3. pressure the force that blood exerts against the walls of your blood vessels
  4. 4. planning center for body movements
  5. 7. when the heart is relaxed and blood flows in
  6. 8. disorder involves extreme mood swings
  7. 9. a nervous system that carries signals to and from skeletal mucles, mainly in response to external stimuli
  8. 11. surface part of an animal where oxygen from the environment diffuses into living cells and carbon dioxide diffuses in the surrounding environment
  9. 13. a nervous system that is made up mostly of nerves that carry signals into and out of the CNS
  10. 15. a sheet of muscle that borders the bottom of the lungs
  11. 16. selects which information to pass on
  12. 17. short, numerous, and highly branched extensions
  13. 22. tiy air sacs in the lungs
  14. 23. an extensive system of internal tubes that branch throughout the body
  15. 26. voice box
  16. 29. extensions, or outfoldings, of the body surface where the respiratory surfaces are found in aquatic animals