There are three important differences to suggest that the embryonic stem cell debate will continue. Embryonic stem cells can contribute an endless supply of new cells; ASC cannot. Absent the controversy, embryonic stem cells are easily available in great quantity from fertility clinics. ASC, on the other hand, are much more limited in supply and more difficult to harvest. Embryonic stem cells provide a pure, controlled line of new cells, an important characteristic for doing research. ASC are much more differentiated, making controlled experimentation more difficult.
Stem cells can be obtained from adults as well. stem cells from adults are commonly known as tissue specific stem cells since each adult cell can only produce a limited set of specialized cells. Stem cells are located practically in every part of an adult. However, only a few of those cells can be isolated successfully. Stem cells in the bone marrow and umbilical cord are the easiest t isolate in adults. These cells are also known as hematopoietic stem cells. Hematopoietic stem cells have been used for a long time in various therapies to cure diseases such as leukemia. This is usually done thr
Stem cells play a pivotal role in the development of the embryo after fertilization. When fertilization takes place, the most versatile stem cells differentiate rapidly forming the blastocyst which is ball like. The outer part of the blastocyst forms the placenta while the inner cell mass part forms all the other body tissues and organs. When isolated and grown in the laboratory, the inner mass cells are known as the embryonic stem cells. Embryonic stem cells can also be produced by in vitro fertilization in the laboratory. However, these cells do not require to be implanted in to a woman. Si
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