Unit 12 Crossword

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Across
  1. 1. rhythmic stretching of arteries caused by the pressure of force through the vessels during systole
  2. 4. concentration of nervous system at the head
  3. 6. division of the autonomic nervous system that controls activities that gain and conserve energy for the body
  4. 7. nerve cell that transports signals from one part of the body to another
  5. 9. uses electrodes on the skin to record the activity of the heart
  6. 12. internal surface is exposed to air, diffusion of O2 and CO2
  7. 14. breathing system where low air pressure in lungs causes air to enter lungs
  8. 17. molecules in red blood cells that carry O2 through the blood
  9. 19. when deep breathing causes large amounts of CO2 to enter blood, which stops the brain from sending signals to the diaphragm
  10. 25. when air physically taken into the lungs, rib cage expands as rib muscles contract
  11. 28. part of the cerebrum that connects the left and right hemisphere so they can process information together
  12. 30. relay point between cells, electrical or chemical
Down
  1. 2. circuit that carries blood between the heart and rest of body
  2. 3. self propagating change in the voltage across the plasma membrane
  3. 5. heart chamber that receives blood
  4. 8. Hemoglobin binds to this, which interferes with the delivery of O2 in the body cells and cellular respiration
  5. 10. takes blood from lower body to right atrium
  6. 11. takes blood from capillaries of the lung to the left atrium
  7. 13. cardiovascular disease caused by the buildup of cholesterol and other substances in the arteries
  8. 15. sets tempo of heart beat, SA node
  9. 16. disease usually caused by smoking, disintegrates alveoli
  10. 18. the largest amount of air that can be exhaled after a deep breath
  11. 20. bits of cytoplasm broken off from bone marrow, help with blood clotting
  12. 21. type of cells that perform the body’s responses
  13. 22. interprets sensory signals and creates response, in central nervous system
  14. 23. sheet of muscle that contracts and relaxes during inhalation and exhalation
  15. 24. clusters of air sacs located at the tips of bronchioles
  16. 26. system that has multiple relay centers in the forebrain, creates emotions and memories
  17. 27. contraction phase of the cardiac cycle
  18. 29. nervous system of the motor division that carries signals to skeletal muscles, voluntary