Circulatory System

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Across
  1. 2. blood vessels that carry blood back to the heart.
  2. 3. the yellow liquid part of the blood that carries nutrients dissolved gases, and other substances.
  3. 6. vessels flexible tubes that circulate blood throughout the body.
  4. 8. the system of organs and tissues involved in circulating blood and lymph.
  5. 10. the thickening of blood to form a scab on the skin that keeps blood from leaving the body.
  6. 11. the measure of your heartbeat
  7. 13. a barrier on the skin that keeps blood from leaving the body.
  8. 14. the four divisions of the heart.
  9. 16. the movement of blood through the blood vessels.
Down
  1. 1. the more powerful lower chambers of the heart.
  2. 4. the two upper chambers of the heart.
  3. 5. an iron- containing substance in red blood.
  4. 7. small, round cell fragments that thicken the blood to help it clot.
  5. 9. microscopic blood vessels that connect arteries and veins.
  6. 12. a membranous fold between each atrium that permits blood to flow in one direction only.
  7. 15. blood vessels that carry blood away from your heart.