Stem cells could provide a resource for testing new medical treatments New medications could be tested for safety on specialized cells generated in large numbers from stem cell lines — reducing the need for animal testing. Unlike embryonic stem cellswhich are defined by their origin cells from the preimplantation -stage embryothe origin of adult stem cells in some mature tissues is still under investigation. The migration of neural crest cells. McKay, R. Although largely theoretical, the concept has some experimental basis.
The blastocyst consists of two parts:.
Stem Cells International
In the experiments reported to date, adult stem cells may assume the characteristics of cells that have developed from the same primary germ layer or a different germ layer see Figure 4. However, stem cells can be difficult to find. Please use one of the following formats to cite this article in your essay, paper or report: An adult stem cell should also be able to give rise to fully differentiated cells that have mature phenotypes, are fully integrated into the tissue, and are capable of specialized functions that are appropriate for the tissue. Myeloid precursors differentiate into monocytes and macrophages, neutrophils, eosinophils, basophils, megakaryocytes, and erythrocytes [ 3 ].