What is a Stem Cell? The term "stem cell" refers to an undifferentiated cell that is capable of developing into other types of cells such as liver cells, kidney cells, brain cells, depending on their surrounding conditions. Every type of cell in the body originates from stem cells that appear during the first few days after an ovum and sperm are united. To know that How is stem cell therapy performed? visit regenestem.
The cells used by embryonic research are produced from unused fertilized eggs designed during in vitro infertility treatment. An ovum that continues to be fertilized by a spermatozoon is called a zygote or morula. Once planted in to the wall of the tummy (usually between day several and day 5), the clump of cells is called a blastocyst. Zygotes or blastocysts are unspecific in which cells they will turn into.
Research on blastocyst stem cells offers the most promise because these stem cells can replicate themselves and have "plasticity" or a chance to differentiate into any cellular type and repair tissues chemistry. Adult stem cells don't offer the same promise since they are somatic or limited and will only develop into the type of cells found in the organ from which they are taken. Furthermore, not all adult organs contain stem cells; therefore only a few organs can be regenerated by employing adult stem cells. This explains why adult stem cells are certainly not adequate to regenerate the parts of the body damaged through Alzheimer's, Parkinson's, SCI and also diabetes.