Cardiovascular system

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Across
  1. 2. delicate blood vessels that exist throughout your body
  2. 5. blood vessels located throughout your body that collect oxygen-poor blood and return it to your heart
  3. 6. helps form blood clots to slow or stop bleeding
  4. 9. blood vessels that transfer freshly oxygenated blood from the lungs to the left atria of the heart
  5. 11. the innermost layer of the heart
  6. 12. blood vessels that carry oxygen-poor blood from the right side of your heart to your lungs
  7. 14. helps the body fight infection and other diseases
Down
  1. 1. middle layer of the heart walls
  2. 3. the largest artery of the body and carries blood from the heart to the circulatory system
  3. 4. the two lower chambers of the heart
  4. 5. large vein that carries blood to the heart from other areas of the body
  5. 7. blood vessels that bring oxygen-rich blood from your heart to all of your body's cells
  6. 8. thin, fluid-filled sac that surrounds the heart
  7. 10. heart chamber that receives blood into the heart and drives it into a ventricle, or chamber, for pumping blood away from the heart
  8. 13. type of blood cell that is made in the bone marrow and found in the blood also known as red blood cells