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stem cell breakthrough

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Uploaded by on Mar 9, 2009

80+ breakthroughs read more in links below
http://www.spuc.org.uk/

What are stem cells?

Each individual human life normally begins at the point when the fathers sperm fertilises the mothers egg, and this is the case for all naturally conceived human beings. Fertilisation by in-vitro fertilisation (IVF) occurs in the same way, but is done in a test-tube rather than within the mothers body.

The life of a person cloned from another human being would also begin with a single cell. However, in this case the reproduction is non-sexual and does not involve sperm at all. In this case the single cell which is the start of life is produced by fusing a cell from the person to be cloned with an unfertilised egg. (For a detailed explanation of this, see Questions and Answers on Human Cloning produced by No Less Human.)

This single cell from which every human life begins then develops and gives rise to more than 200 cell types (eg blood cells, brain cells, heart cells etc.) which make up the adult human body. New cells with unique characteristics are therefore constantly being generated and integrated into the overall structure of the developing embryo.

Early embryos contain stem cells, which can give rise to all cell types in the body. A stem cell is an unspecialised cell that has the capacity to give rise to many different types of specialised cells. When a stem cell divides, it generates two progeny or daughter cells. These cells may both remain as stem cells or one of them may become committed to differentiate and form more specialised cells. The term stem thus means that these cells are the source or origin of other, more specialised, cells. However, stem cells are also found in the placenta and umbilical cord, and in many (perhaps all) adult body tissues, such as fat, bone marrow, blood, skin, muscle etc.

In the process of obtaining stem cells from an embryo, the embryo has to be destroyed. However, no human life has to be destroyed to obtain adult stem cells, or stem cells from umbilical cords or placentas.

Multiple sclerosis (MS) breakthrough/cure
http://www.ncregister.com/daily/adult_stem_cell_breakthrough/
http://www.cbsnews.com/stories/2009/02/10/earlyshow/main4789551.shtml
http://www.mcculloughsite.net/stingray/2009/02/11/adult-stem-cell-breakthroug...


more stem cell cures
http://www.youtube.com/watch?v=yj7ejgEHdPc&NR=1

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