Anatomy Crossword Puzzle

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Across
  1. 2. a one-way, crescent-shaped, three-flap valve located between the right ventricle and the pulmonary artery
  2. 3. a one-way gate located on the right side of the heart between the top chamber and bottom chamber
  3. 5. a small, battery-powered device surgically implanted under the skin in the chest to treat slow or irregular heartbeats
  4. 8. a one-way, half-moon-shaped, three-leaflet structure located between the left ventricle and the aorta
  5. 11. the heart's natural pacemaker, a small cluster of specialized cells located in the top of the right atrium
  6. 13. one of the heart’s four chambers, located in the lower right section
  7. 14. a thin, two-layered, fluid-filled sac that surrounds and protects the heart
  8. 15. the upper right chamber of the heart that acts as a holding chamber for oxygen-poor blood returning from the body
  9. 17. a one-way, two-flap structure located between the heart's upper left chamber and lower left chamber
  10. 19. the thin, smooth, innermost layer of tissue that lines the four chambers and covers the valves of the heart
  11. 20. the body’s largest artery, acting as the main pipeline for oxygen-rich blood
  12. 21. the thick, muscular middle layer of the heart wall responsible for contracting to pump blood throughout the body
  13. 23. specialized, fast-conducting muscle cells located in the inner ventricular walls of the heart
Down
  1. 1. a medical emergency where the heart suddenly stops beating or malfunctions, causing it to stop pumping blood to the body and brain
  2. 4. the major blood vessel that carries oxygen-poor blood from the right side of the heart to the lungs for oxygenation
  3. 6. a small, specialized cluster of cells in the heart that acts as an "electrical relay station" or gatekeeper
  4. 7. one of the four chambers of the heart, located in the upper left section
  5. 9. the largest vein of the heart, acting as the main collector of deoxygenated blood from the myocardium
  6. 10. the body's largest vein, acting as the main "drainpipe" that returns oxygen-depleted blood from the body back to the heart
  7. 12. one of the heart’s four chambers, located in the lower left section
  8. 16. a specialized, 1.8 cm group of muscle fibers in the heart that carries electrical signals from the AV node to the ventricles
  9. 18. a thin wall, membrane, or partition that divides two cavities, spaces, or tissues within the body or in other structures
  10. 22. a collection of specialized heart muscle cells that transmit electrical impulses from the AV node to the ventricles