4.In many tissues, continuous proliferation is restricted to a subpopulation of cells, the stem cells, which undergo self-renewal, as well as differentiation, into cell types with a more restrictive proliferative potential.
在许多组织中,持续增殖仅限于细胞亚群,即经历自我更新以及分化
干细胞形成具有更多限制性增殖潜力
细胞类型。