It's no secret that stem cell research is a highly controversial topic that could potentially lead to great strides in the advancement of modern medicine. There are many factors to consider when making an argument for or against stem cell research. It is not only about physical and tangible factors (types of stem cells, possible uses and benefits, financing), but also emotional factors (ethical and moral). If it is simple to understand the reasons that oppose stem cell research, understanding the reasons that support it may be even simpler. Stem cell research must continue because stem cell research has the potential to advance modern medicine and improve our world. Technically, there is no defined function for stem cells in the human body, and in theory they can develop into almost any type of cell in the human body. body. There are two types of stem cells in the body, called adult or embryonic. Adult stem cells are defined as multipotent, that is, cells limited in the many types of cells they could become. Embryonic stem cells are pluripotent, meaning cells that can develop into any type of cell. Stem cells can be collected from various areas of the body. Bone marrow, umbilical cord blood, placenta, brain, liver, and skin fibers are all examples of where adult stem cells are found. Obtaining these quality stem cells is believed to be the key to potentially finding cures for many dreaded diseases such as Parkinson's, Alzheimer's, cancer and even paralysis. It is the powerful possibilities of stem cell research that make it such a valuable asset to the advancement of modern medicine. Perhaps the most controversial issues in stem cell research are the use of embryonic stem cells and whether their use is and... .. middle of paper ...... Ideas. By Laurie G. Kirszner and Stephen R. Mandell. Boston: Prentice Hall, 2011. 632-39. Print.2. Gyatso, Tenzin. “Our faith in science.” The Blair Reader: Exploring issues and ideas. By Laurie G. Kirszner and Stephen R. Mandell. Boston: Prentice Hall, 2011. 527-29. Print.3. Winslow, Ron and Gautam Naik. "Obama reverses Bush policy on funding stem cell research." Online.wsj.com. Dow Jones & Company, Inc., March 10, 2009. Web. May 19, 2012. .4. “Stem Cell Basics – Types of Stem Cells.” Stem cells in the national academies. 2009. Internet. May 22, 2012. .5. New York Times. “Stem cells”. Stem cells. New York Times, May 11, 2011. Web. May 22 2012. .