gas exchange

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

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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