part of part of has part has part has_part adjacent to adjacent to contributes to morphology of melanocyte Langerhans cell dermal papilla bulb of hair follicle hair follicle matrix region germinal matrix of hair bulb lower zone of bulb of hair follicle FMA:70772 lower part of bulb of hair follicle UBERON:0006004 The bulb region adjacent to the dermal papilla that contains rapidly proliferating matrix cells that give rise to the various cell lineages of the hair shaft and inner root sheath. skin epithelium