Human body

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Across
  1. 3. The barrier between the body and the outside world
  2. 5. One of the strongest bones in our body and supports the weight of the whole body
  3. 7. These are made of calcium and are very hard
  4. 9. They help humans do a lot of things
  5. 11. Humans have 33 of these
  6. 12. The Latin word
Down
  1. 1. Inhales and exhales
  2. 2. Beats rhythmically throughout the human's life
  3. 4. This Latin word means cuckoo
  4. 6. It means loin in Latin
  5. 8. Need to do this 7 to 8 hours everyday
  6. 9. It is almost spherical and hard on the outside
  7. 10. It is made of cartilage and separates the vertebrae