The Heart

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Across
  1. 3. This is the side of the heart where the cardiac muscle is bigger. [4]
  2. 6. Oxygenated blood enter the left atrium through this vein. [13]
  3. 7. What is the name of the valve that prevents the backflow of blood from the right ventricle to the right atrium? [9]
  4. 9. Deoxygenated blood enters the right atrium through this vein. [8]
  5. 10. What is the name of the valve that prevents backflow of blood from the left ventricle to the left atrium? [8]
Down
  1. 1. This type of blood enters the heart having travelled from the lungs. [10]
  2. 2. This type of blood enter the heart having travelled from the body. [12]
  3. 4. What is the name of the valves that prevent the backflow of blood into both ventricles? [9]
  4. 5. What type of muscle is the heart made from? [7]
  5. 8. What is the name of the thick muscular wall that separates the two sides of the heart? [6]