Stem Cell Origins

Diseases and conditions where stem cell treatm...
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Even though this hot button topic seems to have fallen into the shadows, it is still a viable scientific method. A stem cell can be put into any foreign group of cells and attach itself to the area. A stem cell can be put in a cancer patient to rebuild an organ which has been killed off by chemotherapy treatments. Stem cells can also be used to regenerate any organ in the body which has been damaged.

The three main places to find stem cells are in adults, umbilical cords and embryos. To obtain cells from an adult donor, a doctor will extract them from the bone marrow. This is a painful procedure, but if the actual patient has healthy ones left after whatever necessitates the transfer of the cells, this is the best option. This will ensure the body will take the transfer since it is from the same immune system.

Another option to receive stems cells from is the umbilical cord. There have been movies that deal with this issue, such as My Sister’s Keeper, where the umbilical cord of children is stored to be harvested for cells at a time that may be necessary down the road. The umbilical cord can be donated to science for a fee or kept for your family for just in case situations.

The most controversial source of stem cells is the embryo. In this instance, the cells are extracted when the embryo is still technically considered a blastocyst, which is before the cells start to split and differentiate. The controversy lies in the fact that a blastocyst who has stem cells extracted from it, is then destroyed by the procedure. This is usually done when a woman makes the choice to abort a fetus and allows the stem cells to be taken and used.

This is all to say that knowledge is power and there is truth and honesty even in the largest controversy.

Basic Cell Structure

Cells stained for keratin and DNA: such parts ...
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When talking about cells in science, people are discussing the basics of what make up life. Cells make up all living things, as the smallest level. The cellular level of organisms is where processes occur to be able to keep each organism alive.

Many people do not fully understand what a cell is. At its most basic level, a cell is a sac of fluid that is surrounded by membranes. Organelles and chemicals float inside the fluid of cells. Though we know that there are structures smaller than cells, that in fact make up the cells, they are unable to function as the organism does. A cell, on the other hand can convert fuel to energy and get rid of waste, just as the organism that these cells make up can do. That is why cells are considered the lowest structural level of an organism. Cells themselves are living things, they do not only make up living things. Cells are a foundation for all bacteria, animals, and plants.

Cells need to reproduce. If they did not, the living things that they make up would cease to live. One of the interesting things about cells is exactly how they reproduce. They do this by dividing themselves. Cell division is the name of this process. It is the process of the cells not only diving themselves, but also replacing themselves.

There are two different major categories of cells; the eukaryotes and the prokaryotes. Eukaryotes store genetic information in their nucleus, they combine food and oxygen to make energy in a form that is usable, and they have a membrane which is internal. Prokaryotes, on the other hand, do not have “true” nuclei. They have a small amount of genetic material, but it tends to be much less organized. Prokaryotes are seen in blue-green algae and bacteria.

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