There are twenty types of collagen present in living organisms. They are classified scientifically right from it Collagen I to Collagen XII. I is found in teeth, bone, cornea, ligaments, womb, fibrous cartilage, inter-vertebral disc and in the womb. Collagen II occurs in vitreous cells, intervertebral disc and cartilage. III is found in intestines, womb, skin, jaws and heart membranes. IV is present only in membranes.

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Types and Role of Collagen in a Human Body