The extracellular matrix of bone consists of

Bone extracellular matrix consists of  osteocalcin, glycosaminoglycans, collagen, water and bone mineral.

Explanation:

Bone is one of the important connective tissue and provide sites for the muscle attachment.

The extracellular matrix of bone consists of 30% organic matrix. The organic matrix includes glycoproteins, glycosaminoglycans and proteoglycans. The calcium binding protein of extracellular matrix is osteoclacin. Type I and type V collagen is present in the extracellular matrix. Nearly 25% water is present in the bone extracellular matrix. Hydroxyapatite is the bone mineral present in the extracellular matrix of bone.  

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this age may represent the age of the earth's accretion, of core formation, or of the material from which the earth formed. this dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.