The main component of ligaments tendons cartilages & spinal discs is collagen which is the most abundant protein in mammals. Its purpose is to actually connect cells together. The name collagen is derived from Greek & means to produce glue. The tissues mentioned above are also rich in proteoglycans which are composed of 95 glycosaminoglycans GAGs & 5 protein. These GAGs act as a framework for collagen to model onto & consequently are responsible with collagen for continuously r