Unit 2: Transport Systems

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Across
  1. 3. may be "spongy" or "palisade"
  2. 5. scientific name for air sacs in lungs
  3. 7. the shape of red blood cells
  4. 8. the smallest type of blood vessel
  5. 10. white blood cell which engulfs then digests pathogens
  6. 13. thick blood vessel which does not contain valves
  7. 15. pores on the underside of leaves through which water exits plants
  8. 17. the site of absorption in the small intestine
  9. 19. live cells in plants which carry sugar
Down
  1. 1. instrument used to measure the rate of transpiration
  2. 2. deoxygenated blood leaves the heart via this blood vessel
  3. 4. the thickest heart chamber
  4. 6. artery which provides the heart itself with oxygen
  5. 9. dead cells in plants which carry water
  6. 11. pigment which oxygen attaches to in red blood cells
  7. 12. type of cell which controls the opening and closing of stomata
  8. 14. oxygenated blood leaves the heart via this blood vessel
  9. 16. produced by lymphocytes to inactivate pathogens
  10. 18. prevent blood from flowing backwards