It comprises of short stout elongated fibrils. Many collagen fibrils come together and form a collagen and forma collagen fiber.
Collagen contributes to meat toughness.
Diameter of collagen fibers is 1- 12 um. Rarely seen as branched. Collagen fibrils are formed of long tropocollagen molecules. Collagen is a glycoprotein containing galactose and glucose. Hydroxyproline is exclusive to collagen and due to this reason to estimate collagen normally hydroxyproline is estimation is done.