A Scientific Explanation of Stem Cells and Stem Cell Research

In general, if two basic criteria are met, the cell can be defined as a stem cell. First, stem cells can remain self-renewing indefinitely indefinitely, ie cells can divide two identical daughter cells, thereby maintaining a pool of stem cells. Second, stem cells have the ability to differentiate into specific functional progeny under appropriate conditions, or to give a correct signal. It can be asymmetrically divided (Bu) to produce the same cells and daughter cells that acquire particular cell type characteristics such as morphology, phenotype and functional physiology, which are classified as belonging to a particular tissue.

The second type of stem cells are called adult stem cells. Adult stem cells are essentially senescent embryonic stem cells. These stem cells, regardless of age, can be found in anyone's body. These cells are more mature than embryonic stem cells. This means that they are less capable of regenerating different types of cells than embryonic stem cells. Most adult stem cells do not have the ability to regenerate different types of cells. For example, motor neuron stem cells have only the ability to regenerate other motor neuron cells. For example, it can not be an epithelial cell or a hepatocyte. Other adult stem cells are difficult to divide. Therefore scientists must use some medication to lick them so that they can reproduce. However, as ethically controversial, most people prefer these types of cells over embryonic stem cells.

There are three types of stem cells. Embryonic stem cells, adult stem cells, artificial pluripotent stem cells (iPS). The most famous type of stem cells are embryonic stem cells. This is due to the extensive coverage of such stem cells by the media and for many judicial laws developed based on their use. They are also popular among researchers because they are the most flexible type of stem cells. Unlike more mature counterparts, they have the ability to regenerate all kinds of cells. Embryonic stem cells are found in two areas: umbilical cord and embryo. Embryonic stem cells are found in the blood taken from the umbilical cord immediately after birth. It contains hematopoietic stem cells that can be used to produce erythrocytes; among other things. There are also mesenchymal stem cells that can be used to grow muscle and bones. Hematopoietic cells are used for the treatment of blood related diseases such as autoimmune diseases and leukemia