Structure and function of the human heart

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Across
  1. 3. These are the upper chambers of the heart
  2. 5. these are lower chambers of the heart
  3. 8. It continuously circulates through blood vessels
  4. 10. cage Heart is present almost at the centre of this.
  5. 12. The heart is divided into how many compartments
  6. 13. vessels that carry blood towards the heart from various parts of the body
  7. 14. the walls of the veins are
Down
  1. 1. muscular organ
  2. 2. This system performs the circulation of various substances.
  3. 4. The heart is made up of these muscles
  4. 5. Arteries do not have
  5. 6. This protects the heart from mechanical shocks
  6. 7. heart is slightly inclined at this side
  7. 9. Heart consists of how many chambers
  8. 11. blood vessels which carry the blood away from the heart to the body