In the structure of a muscle, several fascicles lie bundled together to form a muscle, just as several lie together to form compact bone tissue. each muscle fiber, which is a muscle cell, consists of protein fibers. similarly, the matrix that lies outside bone cells consists of a protein fiber called .

Collagen is a protein fiber that is found in the matrix that lies outside the bone cells. Population of these collagen fibers that scattered through the matrix are embedded in a gel-like ground substance called hyaline cartilage, which is flexible but avascular and contains no nerves or blood vessels.

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