Unit 5 Cardiovascular System

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Across
  1. 3. related to or affecting the lungs
  2. 4. forces made by one thing against another
  3. 6. absolutely necessary
  4. 9. the two lower chambers of the heart
  5. 11. having to do with the body system that includes the heart and blood vessels
  6. 12. small blood vessels that connect capillaries to veins
  7. 13. parts
  8. 15. a condition that happens when the walls of the arteries thicken and become less flexible
Down
  1. 1. pieces of cells that prevent blood clotting
  2. 2. large blood vessels that carry blood away from the heart
  3. 5. related to or affecting all parts of the body except the lungs
  4. 7. the two upper chambers of the heart
  5. 8. a substance in red blood cells that helps carry oxygen throughout the body
  6. 10. a hard substance that builds up in blood vessels and limits the flow of blood
  7. 14. the liquid that transports the solid parts of the blood