The Body

1. The main organ in the circulatory system (5)
3. The process in which a bone loses its strength and density (12)
6. The space in a herbivore's mouth that lacks canines
7. The process where calcium is used to create bone when a child grows and matures (12)
8. A skeleton which is inside of the body (12)
10. The biggest bone in the body (5)
12. Made up of the nerves that connect the CNS to the rest of the body (3)
14. Building blocks that make up all living things (4)
15. A skeleton that is outside of the body (11)
16. The scientific name for the bone which protects the brain (7)

1. A flexible skeleton supported by fluid pressure (19)
2. A group of cells working together to perform a function (6)
4. Sharp teeth, used for ripping and tearing tough food (6)
5. The components of a cell (9)
9. Paired upper and lower teeth which sharpen each other and are used for shearing meat (10)
11. Teeth that crush and grind food (5)
13. The chemical that builds and maintains strong bones (7)
16. Made up of the brain and spinal chord (3)