gas exchange

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

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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