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Name: mike s
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How do Scientists grow new tissue cells in the lab?

I'm not quite sure what you mean by "new" cells. Several kinds of cell growing are done. One way is to break an organ or tissue apart into its individual cells and grow them in a medium of nutrients, controlled temperature, humidity, and carbon dioxide/oxygen. This is called "primary culture" because the cells come right out of an organism. Another method is to create an "immortal cell line". This is a type of cell isolated from a cancerous tumor, or a non-tumor cell which is infected with a cancer gene after it's isolated. Being cancerous, these cells grow forever in a dish, with the appropriate nutrients etc as long as you remove cells from time to time to prevent overcrowding. These cells can be frozen at about -100F forever and rethawed when needed. There is a library of frozen cells, thousands of types, and a catalog. Scientists can order what they need any time! Finally, you can make specific mutant cell lines by starting as above with an immortal cell, and inserting a specific gene (or deleting one) permanently from the DNA of the cell to change almost any property you want. So there it is.


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