Body systems~ Grade 7/8

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Across
  1. 2. largest internal organ and gland in the human body
  2. 5. main structure of the body
  3. 6. blood vessels that carry blood towards the heart
  4. 8. system that brings in oxygen and removes carbon dioxide
  5. 9. muscular organ that provides blood circulation
  6. 10. biggest bone in the human body
  7. 11. smallest bone in the human body
Down
  1. 1. blood vessels that carry blood away from the heart
  2. 3. set of veins that deliver oxygenated blood from the lungs to the heart
  3. 4. erythrocytes
  4. 6. bones which protect our spinal chord
  5. 7. largest organ of the human body