Biology

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Across
  1. 3. smallest blood vessels; where O2 and CO2 diffuse in and out
  2. 4. the shape of hemoglobin-containing blood cells
  3. 5. blood cells which help in clotting
  4. 7. blood cells which contain hemoglobin
  5. 8. small blood vessels carrying blood away from the heart
  6. 9. a structure that helps cells maintain their shape
Down
  1. 1. a process where a foreign substance is engulfed and digested
  2. 2. branched fibres that carry electrical impulses to the ventricles
  3. 6. blood vessels carrying blood away from the heart