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