One of the most controversial debates in the scientific community concerns stem cell research from embryos,what are stem cell and why are they so important? Embryonic stem cell research is belived to hold the key for better treatments and possible cures for some serious illnesses.Stem cells are primitive cells,and they havethe ability to chang into many different types of cell.There are over 300 distinct types of cella in the human body,but stem cells are the only types that can be grown into other kinds of cells.