gas exchange

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

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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