Respiratory, Cirulatory, Nervous Systems Crossword

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Across
  1. 3. a structure that permits a neuron to pass an electrical/chemical signal to another neuron
  2. 5. an action that is harmful to the lungs, commonly done with cigarettes.
  3. 8. the intensity at which blood flows through blood vessels
  4. 9. primary organs of respiration in humans
  5. 11. blockage of blood flow to the heart muscle
  6. 12. scientific name for red blood cells
  7. 18. the time period when the heart is in a state of relaxation and dilatation
  8. 19. smallest blood vessels
  9. 20. the blood type with no antigens
  10. 21. scientific name for white blood cells
  11. 22. contraction of the myocardium
  12. 24. the part of the brain involved in sensory and motor signal and the regulation of consciousness and sleep
Down
  1. 1. carry deoxygenated blood to the heart
  2. 2. a medical device used to regulate the beating of the heart
  3. 4. maximum volume of air one can displace through inhalation and exhalation
  4. 6. portion of the brain that controls autonomic functions like breathing, digestion, heart and blood vessel function
  5. 7. system with a network of organs and vessels that help in the flow of blood, nutrients, hormones, and oxygen to and from cells
  6. 10. small diameter blood vessel that branches out from an artery
  7. 13. system responsible for taking in oxygen and expelling carbon dioxide
  8. 14. the normal volume of air displaced between inhalation and exhalation
  9. 15. called thrombocytes
  10. 16. a specialized cell transmitting nerve impulse
  11. 17. system that transmits impulses between parts of the body
  12. 19. part of the brain at the back of the skull that coordinates and regulates muscular activity
  13. 23. tube that connects the pharynx and larynx to the lungs