Stem cells are cells found in all multi-cellular organisms. They retain the ability to renew themselves through mitotic cell division and can differentiate into a diverse range of specialized cell types.
Stem Cells
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Types of Stem Cells
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Stem cells are primal, undifferentiated cells which have the unique potential to produce any kind of cell in the body.
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Definition of stem :
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A stem cell is a specific type of cell in the body that has the potential to form many different cell types.
Stem vascular arrangement -- Vascular tissue occurs in long strands called vascular bundles. These bundles are arranged within the stem of dicots to form a cylinder, appearing as a ring of spots when you cut across the stem.
stem
The aboveground part of the axis of vascular plants, as well as anatomically similar portions below ground (such as rhizomes).
stem cells ...
stem cells Cells in bone marrow that produce lymphocytes by mitotic division.
sternum The breastbone.
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).
stem
The part of the plant bearing the buds, leaves, and flowers. It forms the central axis of the plant, and provides mechanical support. If present below ground, it is usually called a rhizome.
Stem cell
Undifferentiated, primitive cells in the bone marrow with the ability both to multiply and to differentiate into specific blood cells.
Source : PhRMA Genomics
Thymine ...
Adult stem cells Cells that can renew themselves and differentiate into a limited number of specialized cell types. They replace and renew damaged tissues.
brain stem The portion of the brain that is continuous with the spinal cord and consists of the medulla oblongata and pons of the hindbrain and the midbrain. PICTURE
bronchi Tubes that carry air from the trachea to the lungs (sing.: bronchus).
Stem Cells
Certainly some plant cells, like the totipotent meristems, are more versatile than animal cells.
Stem cells
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Friday, November 10, 2000
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STEM-LOOP - A feature of RNA secondary structure, in which two complementary, inverted sequences which are separated by a short-intervening sequence within a single strand of RNA base pair to form a '"stem" with a "loop" at one end.
A stem. Usually refers to the pituitary stalk that connects the pituitary gland to the hypothalamus. A slender or elongated structure that supports a plant or fungus or a plant part or plant organ.
The Brain Stem
Your brain stem sites at the base of the brain, and connects it to the spinal cord.
Embryonic stem (ES) cells: Cell lines derived from early embryos that have the potential to differentiate into all types of somatic cells as well as to form germ line cells, and hence whole animals, when injected into early embryos.
cladophyll A stem or branch that resembles a leaf.
clamp Complex set of sclerotized bars, forming a "pinching" organ on the opisthaptor of a monogenetic trematode.
scape - the stem growing from the crown of the root, bearing the blossom without leaves, as in the narcissus and hyacinth; a segment of the antenna in some insects ...
peduncle. The stem of an individual flower or fruit.
peg roots. Primary roots.
pellicle. The covering (skin) that encloses the kernel; it is white during development but becomes brown at maturity.
a germ cell in the stem line of male germ cells that divide mitotically before entering meiosis
Source: Jenkins, John B. 1990. Human Genetics, 2nd Edition. New York: Harper & Row
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an introduction to stem cells (with links to related pages)
parthenogenesis
The News: The drug LDP-341 shows promise against multiple myeloma, a cancer of plasma cells.
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In a collaborative effort, we have begun the identification and characterization of the transcripts produced in the mouse hematopoietic stem cell.
The infraorbital and mandibular arise from a common stem, the terminal part of which anastomoses with the external carotid.
There are many approaches to these issues, but we have concentrated on understanding how a single mammalian gene cluster is activated or silenced as stem cells undergo lineage commitment, differentiation and maturation.
The marsupials and placentals diverged from a pantotheran stem stock in the late Cretaceous. The first marsupials appeared in North America approximately 80 million years ago, e.g.
embryonic or other stem cells) capable of giving rise to all cell types of the embryo, but not extraembryonic tissues (derivatives of trophoblast) are called 'pluripotent.
The tip (terminal bud) of the main stem has a specialized structure that is the source of new growth for plants. You will find the apical meristem that develops into young leaves (primodium).
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), ...
Accordingly, the main vascular bundle of xylem and phloem present in the stem of a plant bifurcates into leaf traces, which are branches of vascular tissue that supply leaves.
During development from stem to fully differentiated, cells in the body alternately divide (mitosis) and "appear" to be resting (interphase). This sequence of activities exhibited by cells is called the cell cycle.
This suffix indicates the complete collection of the subunits described in the word stem.
There are two loci illustrated below, one is for flower color and the other is for stem length. Flower color has five alleles and stem length has two.
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Region of the brain that acts as a relay station between the cerebellum and the cerebrum. The pons is part of the brain stem, and it also aids the medulla in the control of breathing.
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Pedicel the region of a plant stem below the receptacle (below a flower)
(ped‚ pediculus = foot)
Pelagic Zone the open water in the ocean
(pelago = the sea) ...
Iron-response element (IRE) A stem-loop structure found in the mrnas for ferritin and transferrin receptor that interacts with the IRE-binding protein and regulates the translation of the mrnas.
Forecasting science futures: legitimising hope and calming fears in the embryo stem cell debate.
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COMMENTARY ...
Plants, for example, can send out runners or you can stick a stem in the ground and a new plant will form by mitosis from the "parent" plant.
In plants, a propagule is whatever structure functions to reproduce the species: a seed, spore, stem or root cutting, etc.
 See also: Cells, Trans, Organ, Cell, Human
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