Codys Crossword

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Across
  1. 5. carry blood towards the heart.
  2. 6. a thin membrane that lines the inside of the heart.
  3. 8. carry blood away from the heart.
  4. 10. a strong muscular wall that divides the heart into a left and right half.
  5. 11. a watery yellow fluid.
Down
  1. 1. the exchange of substances occurs between them and cells.
  2. 2. small biconcave discs that do not contain nuclei.
  3. 3. two bottom chambers.
  4. 4. the kind of blood the left side of the heart contains.
  5. 7. flat discs that do not contain nuclei.
  6. 9. two upper chambers.
  7. 12. are bigger than erythrocytes but do not have a fixed shape but do have a nucleus.