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6. what does your lungs have to make them more efficient

  • alveoli
  • lots of white blood cells
  • Santa

7. 1 way in which (question 6) is adapted to increase efficiency of breathing is...

  • bells on the end of their hats
  • a small surface area
  • a moist surface
  • a large amount of antibodies

8. for food to be exchanged in the gut it must be in what form

  • soluble ones
  • insoluble ones
  • edible

9. what do you have inside your small intestines to increase exchange?

  • villi
  • alveoli
  • robots

10. the thing mentioned above is adapted in one of the following ways

  • small surface area
  • they own a time travel machine
  • lots of mitochondria close by
  • thick walls

11. having a large surface area is good for exchange

  • True
  • False

12. why do areas involved in exchange usuallly have a rich blood supply

  • no one knows
  • the concentration gradient is kept high
  • it means the heart is close by

13. what is transpiration

  • inspired trains
  • the movement of water through the plant
  • plants sweating