Figure 8. Distribution of Type 1 and Type 2 fibroblasts as a function of age of donors. Compilation of information yielded from experiments on cell reticulation on Matrigel and the presence or absence of VEGFR1 allowed segregation of donors in the two categories, type 1 and type 2. It was noticed from donor data that type 1 was present in all age groups while type 2 was absent in young individuals (below 60 years). Type 2 was the predominant cell population in aged individuals.