Structure of the Heart

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Across
  1. 3. The muscular wall that separates the ventricles in a four chambered heart
  2. 4. The side of the heart that pumps oxygenated blood from the lungs to the body
  3. 6. The muscular organ of the circulatory system which contracts to pump blood around the body
  4. 8. The chamber of the heart that receives blood from the body
  5. 9. Tubes of the circulatory system through which blood travels
  6. 10. The blood vessel that carries blood from the lungs to the heart
  7. 13. Part of the circulatory system that carries oxygen, glucose and cell waste
  8. 15. The blood vessel that carries blood from the heart to the lungs
  9. 16. The blood vessel that carries blood from the lower body to the heart
  10. 19. The type of animal that has a two chambered heart
  11. 20. The chamber of the heart that receives blood from the lungs
  12. 23. The chamber of the heart that pumps blood to the body
  13. 24. A general name for a blood vessel which carries blood TOWARDS the heart
  14. 25. The term that describes blood that has a high concentration of oxygen
  15. 27. A general name for a blood vessel which carries blood AWAY from the heart
Down
  1. 1. A tiny blood vessel where diffusion can occur
  2. 2. The term for the chambers of the heart that PUMP blood
  3. 5. Number of chambers of the hearts of reptiles and amphibians
  4. 7. The chamber of the heart that pumps blood to the lungs
  5. 11. Number of chambers of a human heart
  6. 12. The blood vessel that carries blood from the upper body to the heart
  7. 13. Mammals and ________ have four chambered hearts
  8. 14. The term that describes blood that has a low concentration of oxygen
  9. 17. The blood vessel that carries blood from the heart to the body
  10. 18. The side of the heart that pumps deoxygenated blood from the body to the lungs
  11. 21. The term for the chambers of the heart that RECEIVE blood
  12. 22. In three chambered hearts, oxygenated and deoxygenated blood _____ in the ventricle
  13. 26. Flaps in the heart that prevent the back flow of blood through the heart