xman308 wrote:我也想看人妖戴假睫毛...(恕刪) Stem cells are unspecialized cells that have two defining properties: the ability to differentiate into other cells and the ability to self-regenerate
xman308 wrote:我也想看人妖戴假睫毛...(恕刪) During development, stem cells divide and produce more specialized cells. Stem cells are also present in the adult in far lesser numbers.
xman308 wrote:呵呵~ 麥安內啦~...(恕刪) The role of adult stem cells is believed to be replacement of damaged and injured tissue.
