Stem Cells Essay

Stem cells help us to maintain and heal our bodies, as they are undifferentiated cells, their roles are not yet determined. They have the ability to become anything during early life and growth. Stem cells come from two sources, namely: embryonic stem cells (embryo’s formed during the blastocyst phase of embryological development) and adult stem cells (see figure 3).

Figure 3: showing the locations of adult stem cells (somatic stem cells).

Adult stem cells:
These cells exist throughout the body after embryonic development, they are found inside different types of tissue (organs) of the body such as the brain, bone marrow, blood, blood vessels, skeletal muscles, skin and the liver. They remain in a non-dividing state for years until activated by a disease or tissue injury. Adult stem cells, which are also called somatic stem cells, these cells can only produce specialized cells for that particular tissue type. Somatic stem cells are used as treatment for blood related diseases such as leukemia. Most types of somatic cells are present in low abundance and are difficult to isolate and grow in culture.

Embryonic Stem Cells:
Figure 4: showing a developing human embryo

Figure 5: showing a blastocyst, after 4-6 days, before implantation in the uterus.

Embryonic stem cells are derived from a four or five day old human embryo that is in the blastocyst phase of development (see figure 5). The embryo’s that are used for stem cell research, are extra’s that have been created in IVF clinics (in vitro fertilization), that are no longer needed. Embryonic stem cells are totipotent (cells with the potential to develop into any cells in the body). Scientists have discovered an alternative to embryonic stem cells, these cells ...

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...velopment of tissues to replace damaged organs in the human body. Scientists have discovered for the first time how stem cells could be generated from embryo’s that were produced using adult stem cells.

A more recent discovery, made in 2014, stem cells are being created from cells of young mice, this involves taking mature cells from mice and turning them into embryonic like stem cells, this new technique has not yet been tested in humans.

Conclusion:
I think that stem cell research has advanced in so many ways, with all the discoveries being made, and the new possibilities being explored. Although it still remains unethical because embryonic cells are one of the sources of stem cells. Why is somebody else’s life more valuable than someone else? Just because an embryo cannot talk, doesn’t mean, its life has any less value than a normal human being.