gas exchange

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

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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