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Adult embryonic stem cell

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Stem Cell Research and Abortion Opposition to abortion and opposition to embryonic stem cell research go hand in hand. Embryonic stem cells cannot be culled without killing the embryo. Whether these tiny human beings are explicitly killed for research purposes or not, the ethics of the matter do not change. Because stem cells can differentiate into specialized cell types, they have the potential to replace or repair damaged tissue, be used for organ transplants and treat all sorts of diseases.
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Adult stem cell

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Stem cells: What they are and what they do -

Metrics details. Life-long tissue homeostasis of adult tissues is supposedly maintained by the resident stem cells. However, it has proved difficult to isolate these quiescent stem cells as a physical entity. Recent single-cell RNAseq studies on several adult tissues including ovary, prostate, and cardiac tissues have not been able to detect stem cells. Thus, it has been postulated that adult cells dedifferentiate to stem-like state to ensure regeneration and can be defined as cells capable to replace lost cells through mitosis. This idea challenges basic paradigm of development biology regarding plasticity that a cell enters point of no return once it initiates differentiation. The underlying reason for this dilemma is that we are putting stem cells and somatic cells together while processing for various studies.
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Embryonic stem cell

Most cells in the body are differentiated cells. These cells can only serve a specific purpose in a particular organ. For example, red blood cells are specifically designed to carry oxygen through the blood. All humans start out as only one cell.
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In multicellular organisms , stem cells are undifferentiated or partially differentiated cells that can differentiate into various types of cells and proliferate indefinitely to produce more of the same stem cell. They are the earliest type of cell in a cell lineage. They are usually distinguished from progenitor cells , which cannot divide indefinitely, and precursor or blast cells, which are usually committed to differentiating into one cell type. In mammals , roughly 50— cells make up the inner cell mass during the blastocyst stage of embryonic development, around days 5— These have stem-cell capability.
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