blood: anatomy crossword

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Across
  1. 3. clotting of the blood
  2. 4. middle muscular layer
  3. 7. initiate clotting
  4. 9. inner layer
  5. 10. located in center of thorax
  6. 11. discharge pump below
  7. 14. outer layer of heart
Down
  1. 1. white blood cells (remove microorganisms at infection sites and remove foreign substance and body debri)
  2. 2. destroys parasites
  3. 5. circulating fluid that transports nutrients, O2, CO2, and waste products
  4. 6. provides a solvent for dissolved nutrients
  5. 8. red blood cells (produced in the bone marrow)
  6. 12. interconnected cells that contract in unison
  7. 13. pump receives blood at top