specialised cells

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

Clues

  • "eats" alien cells (5, 5, 5)
  • burrows into ovum (5)
  • carries electrical signals (5, 5)
  • contains haemoglobin that binds with oxygen to form oxyhaemoglobia (3, 5, 4)
  • elastic to aid contraction/relaxation (6)
  • memory of "killer" cells and provides immunity (11)

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