[Ageing changes in collagen -- in vitro ageing changes in collagen (part III) (author's transl)].

In the present three parts of the survey ageing-changes in collagen physical and chemical qualities are discussed at first. Further a summary on questions of the biosynthesis of collagen, changes of the metabolism in the ageing organism and changes of the ripening collagen in the living organism is given. Following in vitro-ageing-changes of collagen and causes of the changes of the ageing organism are described. A summarizing appreciation of the ageing-changes in the collagen finishes the survey.