gas exchange

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

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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