gas exchange

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L X L U K B W F C Q B H V P F H N T A D W
N A Q J T P E O V O F K Q G P B N K N A J
F U U P H O T O I D U B D K J E G H F J X
V B Q K Q Q N R S B J S P K I S X C S G P
T W U N M O L P S O L M C D E K D W K S R
H U T P D X I R M A T Q A L M I I Q N F U
I W P J R U I E F T G R C H S N R I T R G
E K J W M A N T I A G S K S O L U S J O D
J X U A H C L A J N U B J I M H L T Y O B
K P K Y E E Q W O M Q G T S Q L R H U E O
R W N B D O U I R C F A P Y A A T I A D T
T I I S E X S A G J L I U W C C W E M A M
T W I H F U F K E I R N N H X I H M L H V
Q O B C F B W D T A O I E C X C L K N R Y
C U M F T O Y N C S H O E A A K W A K A H
X I I J E J E L T T L I T R M B Q J O F C
W D T K G V E T J E O T T Q Q L K H X W T
X P T B U S Y N S E T I Q T F M N P S V I
L W G W C P E R M E A B L E W A L L S U I
M L N K D F H K Q W U D H O G B N Y E Q V
D J U N Y L X X A J V M U B E G C E A H T

Clues

  • To reduce water loss insects have what around their spiracles? (4, 5)
  • What are pores on the tracheae called? (9)
  • What do the tracheae branch off into? (10)
  • What do they use to close their spiracles to control water loss? (7)
  • What feature of their surface helps with water control? (10)
  • What is another way? (11)
  • What is another? (9, 5)
  • What is one adaptation of teh tracheoles to increase diffusion rate? (4, 5)
  • What is one way respiratory gases move in and out of the tracheae? (9, 8)
  • What structure do insects use to exchange gas? (8)

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