A) fluoride and calcium
B) calcium and phosphorus
C) calcium and potassium
D) phosphorus and potassium
Correct Answer: B
Solution :
[b] Bone cells are embedded in a hard matrix, which is strengthened by fibres, and hardened by calcium and phosphorus salts. The matrix is deposited in form of concentric layers of lamellae formed around a central Haversion canal.You need to login to perform this action.
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