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Adult stem cell embryonic stem cell

An illustration showing a stem cell giving rise to more stem cells or specialised cells. Image credit: Genome Research Limited. An illustration showing different types of stem cell in the body. A scientist here at the Wellcome Genome Campus working on induced pluripotant stem cells. These heart cells were grown from stem cells in a petri dish and can be used to study the beating rhythm of the heart. An illustration showing how stem cells can be used to produce retinal pigment epithelium RPE cells that can be used to treat patients with age-related macular degeneration AMD.
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Stem Cell Key Terms

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What is a stem cell? | Facts | tinnitus-hyperacusis.com

We all have stem cells at work inside us. Right now, inside your bone marrow, stem cells are busy making the , million new blood cells you need every single day! We need to make new cells all the time, just to keep our body functioning. Some specialized cells, such as blood and muscle cells, are unable to make copies of themselves through cell division. Instead they are replenished from populations of stem cells. Stem cells have the unique ability to produce both copies of themselves self-renewal and other more specialized cell types differentiation every time they divide. Stem cells, therefore, are essential to the maintenance of tissues such as blood, skin, and gut that undergo continuous turnover cell replacement , and muscle, which can be built up according to the body's needs and is often damaged during physical exertion.
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Adult and Embryonic Stem Cells

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The field of stem cell research has been developing during the last decade and is now one of the fastest growing areas of biotechnology. Stem cells can be harvested from an established tissue adult stem cell or from the blood of the umbilical cord and these sources, for many, create no specific ethical dilemma. Stem cells can also be obtained from the embryo embryonic stem cells. Obtaining and using these stem cells raises specific ethical questions and is, for some, problematic. Some legislatures have prohibited obtaining and using embryonic stem cells.

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