gas exchange

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

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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