Stem cells are primitive cells that can transform into other kinds of cells, such as muscle or bone cells.
(Stem cells; are; primitive cells that can transform into other kinds of cells, such as muscle or bone cells) (primitive cells; can transform; into other kinds of cells, such as muscle or bone cells)
Stem cells primitive cells
are can transform
primitive cells that can transform into other kinds of cells, such as muscle or bone cells
into other kinds of cells, such as muscle or bone cells