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What is a STEM CELL?Unspecialized cells: can become any type of cell in the body• Serve as the body’s repair system• Renew and Replenish other cells
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Types of Stem cells
1. Totipotent – have unlimited capacity to become anything. – Can become a new person– Usually give rise to Pluripotent stem cells
2. Pluripotent – can give rise to most tissues – Cannot change back into Totipotent stem cells– Can become other stem cells
3. Multipotents – more specific stem cells that are found in adults and children– Used to replenish old/worn out cells
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Where do stem cells come from?
1. Embryonic – blastocyst (embryo)
2. Adult – umbilical cord cells, placenta, children, adults
3. Scientists can now create stem cells in the lab using cells from our bodies (by adding genes = genetic engineering)
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Why are stem cells important to us
1. To study how organisms grow and develop2. Can replace damaged/diseased cells3. Stem cell therapy
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Possible uses of stem cell research
• Replace tissues and organs• Repair defective tissues• Delivery of genetic therapies• Delivery of chemotherapy
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