What is stem cell research?

sunrayz99

Stem cellular structures are cells found in most multi-cellular organisms. They are capable of retaining the ability to reinvigorate themselves through mitotic cell division and can differentiate into a diverse range of specialized cell types. Research in the stem cell field grew out of findings by Canadian scientists Ernest A. McCulloch and James E. Till in the 1960s.[1][2] The two broad types of mammalian stem cells are: embryonic stem cells that are found in blastocysts, and adult stem cells that are found in adult tissues. In a developing embryo, stem cells can differentiate into all of the specialized embryonic tissues. In adult organisms, stem cells and progenitor cells act as a repair system for the body, replenishing specialized cells, but also maintain the normal turnover of regenerative organs, such as blood, skin or intestinal tissues. http://en.wikipedia.org/wiki/Stem_cell Apr 21 08, 11:20 AM

BRY2K

This site is Stem Cell 101, very useful. What Are Stem Cells? Stem cells are the parent cells for all tissues and organs of the body. They exist mainly to maintain and repair cells in the areas where they are found. Stem cells are found in the blood, bone marrow, skin, muscle, and organs like the brain and liver. Scientists work with different kinds of stem cells: animal and human, embryonic stem cells, and adult stem cells. Umbilical Cord Blood and Placental Stem Cells Stem cells are present in umbilical cord blood and the placenta. Once a baby is born, these cells can be extracted from the discarded tissue and preserved for the benefit of children and adults who suffer from devastating bone marrow and blood diseases. These stem cells are obtained after the baby is born. There is no harm to the mother or child. etc. http://www.stemcell.umn.edu/stemcell/stemcell101.html Apr 21 08, 11:45 AM