Circulatory system

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Across
  1. 3. a blood vessel that carries blood away from the heart.
  2. 5. a chamber in an animal's heart that pumps blood out to the body.
  3. 6. organs of the respiratory system that bring oxygen-rich air into the body and send oxygen-poor air out of the body.
  4. 9. a small blood vessel that transports nutrients and gasses between the blood and tissues in an animal.
  5. 11. tiny air sacs in the lungs that are the site of gas exchange between the lungs and blood; singular: alveolus.
  6. 12. the muscular organ of an animal that pumps blood throughout the body.
Down
  1. 1. the body system that delivers blood to different parts of a body; consists of the heart, blood, and blood vessels.
  2. 2. the system that transports blood and other fluids throughout the body.
  3. 4. cells that protect the body from disease
  4. 7. Liquid part of the blood
  5. 8. Cells that give blood its red color and carry oxygen.
  6. 10. blood vessels that carry blood toward the heart.