PERICHONDRIUM

PERICHONDRIUM
Except the articular cartilage all hyaline cartilage is covered by perichondrium. It consist of type I collagen fibers and fibroblast in the outer layer. The inner layer is composed of reserved cells or chondroblasts which differentiates into chondrocytes. It is essential for nutrition and growth
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CHONDROCYTE

1- They appear in a group of up to eight cells originating from mitotic division of single Chondrocyte,called isogenous group.
2. The chondrocytes are located in matrix cavities called lacunae.
3. The peripheral zone around the groups is called territorial or capsular matrix, poor in collagen and rich in sulfated glycosaminoglycan, exhibit intense basophilia than does the matrix located between the capsules called inter territorial matrix.

MATRIX
in sulfated glycosaminoglycan, exhibit intense basophilia than does the matrix located between the capsules called inter territorial matrix.
MATRIX
Fiber + ground substance
1- It has primarily type II collagen which is in the form of fibrins and is indiscernible from the ground substance.
2. The ground substance contain chondroitin 4 and 6 sulfate, and keratin sulfate in the proteoglycans.
3. The hyaluronic acid binds to these proteoglycan and is responsible for high content of solvation water. 4.Chondronectin is the glycoprotein which adheres chondrocytes to matrix collagen