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Stem cell


Stem cell
[L. cella - compartment]. An undifferentiated cell that is mitotically active in either replacing dying body cells (somatic stem cell) or producing gametes (germinal stem cell).
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Stem cells are cells that divide by mitosis to form either
two stem cells, thus increasing the size of the stem cell "pool",
or
one daughter that goes on to differentiate, and
one daughter that retains its stem-cell properties.
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Stem cells are primal undifferentiated cells that retain the ability to divide and differentiate into other cell types. In higher plants this function is the defining property of the meristematic cells.
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Stem cells can be found in all adult and young adult beings. Adult stem cells are undifferentiated cells that reproduce daily to provide certain specialized cells-for example 200 billion red blood cells are created each day in the body from ...
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Dr. Donald Orlic, of the National Human Genome Research Institute's Genetics and Molecular Biology Branch, defines hematopoietic stem cell.
related
terms:
cell ...
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Stem Cells
Certainly some plant cells, like the totipotent meristems, are more versatile than animal cells.
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Stem Cells
Therapeutic cloning, also called "embryo cloning" or "cloning for biomedical research," is the production of human embryos for use in research.
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stem cells
The common, self-regenerating cells in the marrow of long bones that give rise, by differentiation and division, to red blood cells and all of the different types of white blood cells.
stereoisomer ...
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stem cells Cells in bone marrow that produce lymphocytes by mitotic division.
sternum The breastbone.
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The construct is then taken up by embryonic stem cells, where the engineered copy of the gene replaces the organism's own gene. These stem cells are injected into blastocysts, which are implanted into surrogate mothers.
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Germline stem cells reside in the anteriormost region of the germarium, immediately under the terminal filament (Fig. 1A).
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B cell A type of lymphocyte derived from bone marrow stem cells that matures into an immunologically competent cell under the influence of the bursa of Fabricius in the chicken, and the bone marrow in nonavian species; ...
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This laborious method involves transfecting a crippled gene into cultured embryonic stem cells, searching through the thousands of resulting clones for one in which the crippled gene exactly replaced the normal one (by homologous recombination), ...
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After the cells were replaced, many of the cells contained the gene. White blood cells, however, are short-lived and a long-term solution is to apply this technique to the cells that produce the white blood cells (called stem cells).
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stem cells The precursor, self-regenerating cells in bone marrow that give rise to differentiated blood cells such as erythrocytes and lymphocytes.
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