Bone tissue

Like all conjunctive Fabric, the bone tissues consists of cell S dispersed in a extracellular Matrice abundant. The fundamental Substance is hard, rigid and impregnated of calcic salts , which differentiates bone tissues from the other conjunctive fabric classes which are the conjunctive fabrics themselves and the cartilagineux fabrics.

They form the hard Organe S which one calls Os.

Components

The cells of bone tissues include/understand fixed cells (Ostéoblaste S and Ostéocyte S) or foreign (Ostéoclaste S). The extracellular matrix or osseous substance is made of an organic part (fibers of collagen of the type I and fundamental substance) and of a mineral part (mainly of calcium salts).

Classification

The provision of fibers of Collagène makes it possible to distinguish two varieties from bone tissues:

the fibrous bone tissue (or primary education)
the lamellate bone tissue (or secondary)

The Dentine is a particular variety of bone tissue located at the level of the tooth.

Osteogenesis

The Osteogenesis, or formation of bone tissue, uses a process of Métaplasie during which a conjunctive fabric is transformed into bone tissue.

Remarks

The Périoste is the conjunctive fabric itself which surrounds the bone.

Cartilagineux and osseous fabrics can possibly meet in the vicinity one of the other on the level of the histological cuts. These two fabrics share a common morphological characteristic since they are formed by cells placed in cavities dispersed in the extracellular matrix. Several characteristics make it possible however to distinguish them one of the other.

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