1.3 Location and types of stem cell location: embryo、 infant、 adult types: embryonic stem cell\ adult stem cell Single Cell Embryo 5-7 Day Embryo Infant Adult Totipotent Embryonic Stem(ES)Cells “Adu|t" Stem cells Pluripotent Multipotent Cord Blood stem cells Placental Stem Cells Multipotent origin of stem celltypes: embryonic stem cell、adult stem cell 1.3 Location and types of stem cell origin of stem cell location: embryo 、infant 、 adult