Basis of differentiation | Progenitor cells | Stem cells |
Definition | These cells are unipotent or multipotent stem cells which originate from stem cells; they differentiate to form specialized cell types | Are undifferentiated cells of a multicellular organism which that able to infinitely multiply into more cells of the same type |
Cellular potency | Are either unipotent or oligopotent | Can either be multipotent, pluripotent, or totipotent |
Degree of differentiation | Are somewhat differentiated | Are completely undifferentiated |
Self-renewal | Have a limited self-renewal ability | Are easily able to undergo self-renewal and divide into identical stem cells |
Location | Found in specific tissues and organs | Found in many different types of tissues and organs throughout the body |
Origin | Are derived from stem cells which then differentiate again to form specialized cell types | Originate from embryos or adult tissues |
Function | Their primary function is to replenish dead or damaged cells | Their function is to regenerate damaged tissues and organs |