Stem Cell

Stem cells are very important to our body.  They can help our body do many things and help us through many stages we go through such as growth.  They also can be an "internal repair system."  They can repair many cells as long as you are still alive.  Stem cells are special they can repair themselves as well as other cells.  These cells can do this by dividing.  Stem cells cannot only repair other cells but damaged tissue, but although they can do this it takes a lot for them to actually go through with this action.

FOUR KINDS OF STEM CELLS!
Embryonic Cell:
Primitive cells derived from a 5-day embryo that are capable of dividing without differentiating for a prolonged period in culture, and are known to develop into cells and tissues of the three primary germ layers.

Somatic Adult Cell:
A relatively rare undifferentiated cell found in many organs and differentiated tissues with a limited capacity for both self renewal (in the laboratory) and differentiation. Such cells vary in their differentiation capacity, but it is usually limited to cell types in the organ of origin. This is an active area of investigation.

Human Embryonic Cell:
A type of pluripotent stem cell derived from the inner cell mass of the blastocyst.

Induced Pluripotent Cell:
Somatic (adult) cells reprogrammed to enter an embryonic stem cell–like state by being forced to express factors important for maintaining the "stemness" of embryonic stem cells (ESCs). Mouse iPSCs were first reported in 2006 , and human iPSCs were first reported in late 2007 . Mouse iPSCs demonstrate important characteristics of pluripotent stem cells, including the expression of stem cell markers, the formation of tumors containing cells from all three germ layers, and the ability to contribute to many different tissues when injected into mouse embryos at a very early stage in development. Human iPSCs also express stem cell markers and are capable of generating cells characteristic of all three germ layers. Scientists are actively comparing iPSCs and ESCs to identify important similarities and differences.

All in all stem cells can help your body in many different ways.  They can repair mostly anything inside of your body.  Messed up tissue, the heart, lungs, skin, sperm, eggs, bone marrow, muscle, and the brain.