Crossword

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Across
  1. 3. carried to the heart
  2. 5. exchange gases to remove carbon dioxide and add oxygen to blood
  3. 6. a part of an organism that is typically self-contained and has a specific vital function, such as the heart or liver in human
  4. 9. includes the heart and blood vessels
Down
  1. 1. carry blood and nutrients to the heart and throughout the body
  2. 2. organ that pumps blood
  3. 3. connect arteries and veins
  4. 4. carried away from the heart
  5. 7. controls the direction of blood flow
  6. 8. carry blood and nutrients away from the heart and throughout the body