How stem cells are classified

Generally there are 2 types of stem cells, embryonic and adult stem cells.

Embryonic stem cells - technically called totipotent and produce all types of tissue. This is the very early stage of a recently fertilised egg and has only about 8 cells( morula)

Inner cells-pluripotent can become almost all types of cells and are taken from an early embryo stage.

 Adult stem cells are typically called multipotent cells like bone marrow cells that can produce a wide range of different blood cells. There are also some cell types in the body that have be multipotent in order to maintain normal blood health.

There are also umbilical cord stem cells, technically not embryonic but have high potential for a wide differentiation of cell types.

Some tissues contain very undifferentiated cells that can be 'reversed' to a certain extent and can then be 'teased' into creating different cells

But there is continuing research into if it is possible to make multipotent cells into pluripotent types.