Bone
1) . A mixture of calcium salts–primarily calcium phosphate with lesser amounts of calcium carbonate
2) . minerals are organized around collagen fibers, which results in a strong, somewhat flexible combination that is very resistant to shattering.
Canaliculi in bone
1). form a branching network for the exchange of materials between blood vessels and the osteocytes.
compact bone:
contains blood vessels trapped within the matrix
Spongy bone:
no blood vessels trapped within the matrix
periosteum
composed of a fibrous outer layer and a cellular inner layer