Question

why are stem cells important

Answer 1

ave the remarkable potential to develop into many different cell types in the body during early life and growth. In addition, in many tissues they serve as a sort of internal repair system, dividing essentially without limit to replenish other cells as long as the person or animal is still alive. When a stem cell divides, each new cell has the potential either to remain a stem cell or become another type of cell with a more specialized function, such as a muscle cell, a red blood cell, or a brain cell.

Answer 2

I took that from NIH's site
http://stemcells.nih.gov/info/basics/basics1.asp

Answer 3

They can use stem cells to create complete organisms or organs!