Cardiovascular Crossword 67

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Across
  1. 1. a muscular wall that separates the heart into a right side and a left side; prevents blood from moving between the right and left sides of the heart
  2. 5. between the left atrium and left ventricle; allows blood to flow into the aorta and prevent blood from flowing back into the left atrium
  3. 6. thickest layer of tissue that forms the heart; muscular middle layer
  4. 8. flows through the circulatory system; often called tissue as it contains many kinds of cells
  5. 9. double-layered membrane, or sac, that covers the outside of the heart
  6. 13. receives oxygenated blood from the lungs
  7. 15. brief period of rest of the cardiac cycle
  8. 18. receives blood from the right atrium and pumps the blood into the pulmonary artery, which carries the blood to the lungs for O_2
  9. 20. receives blood as it returns from the body cells
  10. 23. smooth layer of cells that lines inside of the heart and is continuous with the inside of blood vessels
  11. 24. receives blood from the left atrium and pumps the blood into the aorta for transport to the body cells
  12. 25. blood vessels that carries blood back to the heart
Down
  1. 2. 90 percent water, with many dissolved, or suspended, substance; makes up blood
  2. 3. between the right ventricleand the pulmonary artery; a blood vessel that carries blood to the lungs
  3. 4. between the right atrium and the right ventricle; allows blood to flow to the lungs and prevents blood from flowing back into the right atrium
  4. 7. the "transportation" system of the body; transports O_2 and nutrients to body cells and transports CO_2 and metabolic materials away from body cells
  5. 10. platelets; important for the clotting process
  6. 11. white blood cells
  7. 12. connect arterioles with venules; smallest blood vessels
  8. 14. allows blood to flow into the aorta and prevents blood from flowing back into the left ventricle
  9. 16. a period of ventricular contraction
  10. 17. red blood cells
  11. 19. abnormal heart rhythms and can be mild to life-threatening
  12. 21. a complex protein that carries O_2 and CO_2; gives blood its red color
  13. 22. carry blood away from the heart