gas exchange

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

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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