The heart

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Across
  1. 4. structures within the heart that regulate blood flow between its chambers
  2. 5. one of the four chambers of the heart, located on the upper right side.
  3. 6. one of the four chambers of the heart, located on the left side
  4. 8. the main artery of the body
  5. 10. gatekeeper for electrical signals from the atria to the ventricles
Down
  1. 1. a minute, hairlike blood vessel connecting the smallest arteries and veins or a tube with a very fine bore
  2. 2. a small group of specialized cells located in the right atrium of the heart
  3. 3. A blood vessel that carries blood to the heart from tissues and organs in the body
  4. 7. two of the body's largest veins that carry deoxygenated blood from the upper and lower body
  5. 9. A blood vessel that carries blood away from the heart