hydroxyapatite
Calcium makes them hard.
calcium
milk
milk
the blod of the heart and the heath
calcium and antioxidants
The main mineral is calcium.
Mineral salts from calcium and phosphorus compounds are essential for making bones hard and strong. calcium is the most essential mineral to make bones strong but not all bones are as hard as you think some bones are "Spongy" but we just dont notice it. hope this helps if you need to know this....
It makes them hard and strong, in the form of the mineral "calcium carbonate".
soft you can bend and hard you can not
Seal's bones are hard.
It contains calcium which is a substance that does not weight. Therefore it makes bones be strong and hard. If you took the calcium, the bones would be flexible and not hard at all.