Stem Cells are known for their ability to reproduce themselves or divide and become any other types of cells. They appear thanks to these two main sources: Adult stem cells, and Embryonic stem cells.
The first cells mention exist throughout the body after embryonic development and are found inside of different types of tissue such as the brain, bone marrow, blood, blood vessels, skeletal muscles, skin, and the liver. They remain in a non-active state until its necessary for the body due to a disease or tissue injury. It's possible for one of these cells to turn into any other cell but this is just a thought, because it's an idea that some investigations suggest, and it is also thought that their changing abilities are limited. Anyways, they are able to divide enough to even re-make an organ.
Embryonic Stem Cells is the other main source to get stem cells, it can be made in in vitro fertilization, which is a technique that unites an egg and sperm without the female body being used, (in vitro is Latin for "in glass" so it can be done in a dish or test tube). In a normal pregnancy the 3- to 5-day-old embryo, called a blastocyst, the inner cells give rise to the entire body of the organism, including all of the many specialized cell types and organs such as the heart, lung, skin, sperm, eggs and other tissues.
No comments:
Post a Comment