What are two organs that are difficult to repair using stem cells?

The skin and the liver. The skin is the largest organ in the body and interacts with most other organs in the body in some way, due to it's size and coverage, it is difficult to repair easily using skin cells. The liver is one of the most complex organs in the body and as the detoxifying organ in the body is complex to repair.

Schist. hope it

Cell division is important to single celled organisms because it allows the cells to reproduce. through cell division, cells make exact copies of themselves. when single celled organisms go through cell division, they make exact copies of themselves which is how they reproduce.