Biology

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Across
  1. 3. what do veins have ?
  2. 4. what are the small fragment of cells involved in blood clotting called ?
  3. 6. what carries blood away from the heart?
  4. 7. what pigments are found in red blood cells ?
  5. 8. what is a more concentrated solution called?
  6. 9. what are arteries thick walls made out of ?
Down
  1. 1. what releases enery ?
  2. 2. blood cells what forms part of the bodies defence system ?
  3. 5. cava what does blood pass through into the heart on the right side of the heart ?
  4. 8. what is a more dilute solution called?