Circulatory System

12345678910111213141516171819202122232425
Across
  1. 2. receives blood as it returns from the body cells
  2. 5. connects arterioles with venules, smallest veins
  3. 7. 90 percent water, with many dissolved, or suspended, substances
  4. 10. located between the right atrium and the right ventricle, closes when right ventricle contracts, allowing blood to flow to the lungs and preventing blood from flowing back into right atrium
  5. 12. receives blood from the right atrium and pumps blood
  6. 13. blood vessels that carry blood back to the heart
  7. 15. phase of heartbeat when the heart muscle contracts and pumps blood from the chambers into the arteries
  8. 16. flows the the circulatory system
  9. 19. the transportation system of the body
  10. 21. white blood cells, formed in the bone marrow and lymph tissue
  11. 22. receives oxygenated blood from the lungs
  12. 23. the muscular middle layer
  13. 24. muscular wall that separates the heart into a right side and a left side
  14. 25. double-layered membrane
Down
  1. 1. fragments or pieces of cells that lack nuclei and vary in shape and size
  2. 3. Closes when the left ventricle is contracting, allowing blood to flow into the aorta
  3. 4. red blood cells produced in the red bone marrow at the rate of about one million per minute
  4. 6. carry blood away from heart
  5. 8. the largest artery in the body
  6. 9. receives blood from the left atrium and pumps blood into aorta
  7. 11. carries oxygen and gives blood its characteristic
  8. 14. smooth layer of cells that lines the inside of the heart
  9. 17. phase of the heartbeat when the heart muscles relaxes and allows the chambers to fill with blood
  10. 18. located between the right ventricle and the pulmonary artery, a blood vessel that carries blood to the lungs.
  11. 20. abnormal heart rhythms and can be mild to life threating