Across
- 3. what are the two main types of hard tissue?
- 5. what is required for the formation of the matrix in bones and teeth and to control calcium movement in and out of bones?
- 6. how many bones are there in a human body?
Down
- 1. what is required to form a collagen matrix which is the foundation of hard tissue?
- 2. what plays a crucial role in maintaining levels of calcium in the blood?
- 3. what structures are involved in the skeleton?
- 4. what acts in cooperation with phosphorus to build, harden and maintain bones and teeth?