how does stem cells develope diffrent types of cells?
107590
They are like little baby cells that don't really know what they want to be yet (unless they are already adult stem cells) You can put them in with a bunch of cells of the same kind and they will grow into that type of cell.
10520
All you need to know is at:\nhttp://en.wikipedia.org/wiki/Stem_cells
590606
cell differentiation \n\nProgressive restriction of the developmental potential and increasing specialization of function which takes place during the development of the embryo and leads to the formation of specialised cells, tissues, and organs. When young cells develop as a result of [[cell division, they become differentiated to suit the function they were made for. This is done by the genetic information present in the cell, which will have genes 'switched on' and 'switched off' to determine the function of the cell.
896374
Mainly because embryonic stem cells proliferate (multiply rapidly) for a year or more in the laboratory without differentiating, but most adult stem cells cannot.  Scientists cannot have not determined why this is so but it works to their advantage.
773822
A stem cell is a cell that hasn't been differentiated yet.  Meaning it is not yet a skin, brain, liver, heart, muscle, etc. cell.  They are mostly found in embryos because they obviously are still developing so there is a large amount of stem cells there.  Adults also have stem cells in our bone marrow because that is the site of blood cell synthesis (we are constantly making new blood cells).  \nStem cell research is important in finding out how to differentiate cells into what we want.  This would be nice for making new organs for transplants or even new skin for grafts.  I'm not sure if we can use the stem cells from adults or not, but as far as i know, in the US we are not allowed to use new stem cells for research, only the ones we already have. \nIn my opinion, since there are abortions already being performed (no matter what your opinion of it, it's being done) , instead of just wasting the embryo/fetus, we should at least put it to good use and use it for research to help others.
741835
All human beings start their lives from a single cell, called the zygote, which is formed after fertilization. The zygote divides and forms two cells; each of those cells divides again, and so on. Pretty soon, about five days after conception, there is hollow ball of about 150 cells called the blastocyst. The blastocyst is smaller than a grain of sand and contains two types of cells, the trophoblast and the inner cell mass. Embryonic stem cells are the cells that make up the inner cell mass. As embryonic stem cells can form all cell types in an adult, they are referred to as pluripotent stem cells.\n\nStem cells can also be found in very small numbers in various tissues in the adult body. For example, bone marrow stem cells are found in the marrow of the bone and they give rise to all specialized blood cell types. Adult stem cells are typically programmed to form different cell types of their own tissue; they are called multipotent stem cells. Adult stem cells have not yet been identified in all vital organs. In some tissues like the brain, although stem cells exist, they are not very active, and thus do not readily respond to cell injury or damage. Scientists are now also exploring ways in which they can induce the stem cells already present to grow and make the right cell types to replace the damaged ones. \n\nStem cells can also be obtained from sources like the umbilical cord of a newborn baby. This is an accessible source of stem cells, compared to adult tissues like the brain and bone marrow. Although scientists can grow these cells in culture dishes, they can do so only for a limited time. Recently, scientists have discovered the existence of stem cells in baby teeth and in amniotic fluid-the "water bath" that surrounds an unborn baby- and these cells may also have the potential to form multiple cell types. Research to characterize and study these cells is very promising but at a very early stage.
155428
Skin, neural crest cells, and the neural tube are all derived from ectoderm in the embryo.\n\nMuscle cells are derived from mesoderm.
222535
Morphogenesis (from the Greek morphê shape and genesis creation) is one of three fundamental aspects of developmental biology along with the control of cell growth and cellular differentiation. Morphogenesis is concerned with the shapes of tissues, organs and entire organisms and the positions of the various specialized cell types. Cell growth and differentiation can take place in cell culture or inside of tumor cell masses without the normal morphogenesis that is seen in an intact organism. The study of morphogenesis involves an attempt to understand the processes that control the organized spatial distribution of cells that arises during the embryonic development of an organism and which give rise to the characteristic forms of tissues, organs and overall body anatomy. In the human embryo, the change from a cluster of nearly identical cells at the blastula stage to a post-gastrulation embryo with structured tissues and organs is controlled by the genetic "program" and can be modified by environmental factors.\n\nSome of the earliest ideas on how physical and mathematical processes and constraints affect biological growth were written by D'Arcy Wentworth Thompson and Alan Turing. These works postulated the presence of chemical signals and physico-chemical processes such as diffusion, activation and deactivation in cellular and organismic growth. The fuller understanding of the mechanisms involved in actual organisms required the discovery of DNA and the development of molecular biology and biochemistry. More recently, Lawrence Edwards succeeded in applying the path curves of projective geometry to provide a rigorous mathematical description of biological forms such as eggs, buds and cones.\n\nMore info visit
632284
Cell replacement is accomplished by cell division, which makes more cells to replace cells that have been damaged by wear and tear or senescence (cells growing old and failing to function).\nIn some cases, a single cell of a certain type can divide to give rise to two daughter cells of the same type. This process allows one cell to replace cells of its own type. For example, a liver cell can divide to generate two liver cells. Another example is endothelial cells, which line the inside of our blood vessels; a single endothelial cell will duplicate itself by dividing into two cells.\nIn another case, a special kind of cell, called a stem cell, is used for cell replacement. These cells also divide into two daughter cells. Some of these daughter cells become stem cells that resemble the mother cell. Other daughter cells become the cell type that needs to be replaced. For instance, our skin contains stem cells called basal cells. These basal cells divide into daughter cells. Some of the daughter cells become basal cells that retain the ability to divide, and other daughter cells become specialized into skin cells. That way, some of the cells are used for cell replacement, while other cells retain the ability to divide in the future so that we don't run out of skin cells.\nIn still another case, a single cell called a pluripotent stem cell can divide to generate—and thus replace—lots of different cell types. For example, our bone marrow contains cells called hemopoietic stem cells that can divide to generate the whole range of blood cells. A single hemopoietic stem cell can divide several times to generate red blood cells as well as different kinds of white blood cells.\nThe rates at which cells are replaced vary quite a bit. For example, in the inner lining of the small intestine, cells turn over in a week or less. In the pancreas, the turnover time may be as long as a year or more.\nSometimes the rate of cell division to replace cells depends on the state or size of the tissue. Liver cells rarely divide, but if there is injury to the liver and the liver is somehow reduced, liver cells will divide to get the liver back to the right size. Similarly, in the skin, the basal cells will divide only to keep the skin at a certain thickness. If the outer layers of dead skin peel away more frequently, the basal cells on the inside will divide more frequently to make up for the lost skin. If a person takes good care of his or her skin and there is little damage and fewer cells to replace, the basal cells will reduce the frequency of division.
599131
bmps can be used to stimulate stem cells to differentiate along certain lineages (osteogenesis for example), and can also be used to prevent stimulation into specific cell types (for example embryonic cells into neural)
455022
cells dont have cells but they they have organelles which are sort of like cells, which includes mitochondria, ribosomes, golgi apparatus, etc. that have various functions such as converting sugar to energy, synthesizing proteins, etc. they're sort of like minature organs if the cell was your body (hence the name organelles
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Stem cells don't come from babies, they come from blastocysts.\n\n"Embryonic" stem cells is actually a misnomer. These cells come from blastocysts. which are developmentally younger than embryos.\n\nStem cells are derived from blastocysts that are left over after couples have had children using in vitro fertilization. For couples using in vitro fertilization, the woman has eggs harvested, which are then fertilized by sperm in a dish in the clinic. Eggs that are successfully fertilized are allowed to divide for 3-6 days, forming tiny balls of a 100 or so cells called blastocysts. These are frozen, and when the couple is ready, a few of these are implanted in the woman's womb.\n\nAfter the couple has conceived, they must decide what to do with the left over blastocysts. Some couples pay to keep their remaining blastocysts frozen, but most left over blastocysts are simply discarded! These discarded blastocysts, numbering in the hundreds of thousands, could be used to derive stem cells. The lines that are approved by the Federal government were created when couples donated their unwanted frozen embryos to research.\n\nThe blastocysts are like tennis balls, solid on the outside, but hollow in the middle. Stem cells are found in a little lump inside that hollow ball. Researchers have found a way to crack the ball in half and remove the stem cells.\n\nStems cells removed from the hollow ball can never develop into a human. The hollow ball contains the instructions or blue print to create a human from the stem cells. Without the instructions, a human can never form.\n\nOnce the stem cells are removed and placed in a dish in the lab, they continue to make exact copies of themselves, called daughter cells. They will only make exact copies of themselves and nothing else until a researcher adds different chemicals, or molecular signals, that tell the stem cells to become something else. Once we understand what makes them become what ever cell type, be it heart, pancreas, liver, or spinal cells, we have exquisite control over the repair process, being able to replace the cell type we want with more of the tissue derived from stem cells.
951092
a group of cells form a tissue
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Cell division reproduces the same kind of cell.  Cell differentiation is, in embrionic development, the situation wherein cells split-off in different "directions" to become very different things (eg., skin, spleen,...etc.)\n     An editorial:  Stem cell research is investigating the ways that very basics cells (think "undecided") might be introduced and encouraged to grow into cells... organs... to correct some sort of desease or injury.  I think it's a good thing!
345920
It divides by mitosis then it begin to grow.According to which type of cell your referring to.That's what I think.
765492
A stem cell is essentially a cell with potential; it hasn’t yet become a specific, ‘useful’ cell. Stem cells are capable of becoming a variety of ‘useful’ cells. For example, a blood stem cell may become any type of blood cell, such as red or white. The basis of stem cell use in medicine is to manipulate their growth into tissues which people have lost through injury or disease, such as loss of certain brain cells in Parkinson’s disease, and thereby treat diseases previously considered incurable.\n\nTHERE ARE INFACT TWO TYPES OF STEM CELL undergoing medical research: Embryonic Stem Cells (ESCs) and Adult Stem Cells (ASCs). \n\nASCs are taken from a human adult, and usually either transplanted to another part of the body, or artificially encouraged to grow to greater numbers. ESCs are taken from human embryos which have been created artificially. Under the right conditions, these cells can then be grown in a lab, and if given the appropriate chemical signals, can be manipulated to become virtually any type of cell imaginable. In either case the aim is to replace tissues lost through disease.\n\nThose opposed to the use of ESCs strongly advocate the use of ASCs. However, many scientists believe that ASCs are ultimately less useful medically, as they cannot replace all types of cells. They exist in very small amounts and are therefore hard to find, and in extremely limited supply if wanted for transplantation on a large scale. They are also difficult to grow in culture. By contrast, ESCs are easy to isolate, grow and manipulate, and have a greater variety of uses. Thus, they are favoured by scientists as a medical tool. As ASCs come directly from the adult patient, there is essentially no controversy, as there are no life-issues at stake. It is the use of ESCs which\nis the cause of the debate, as it involves artificially creating a human embryo, harvesting the cells and then destroying the embryo. The moral objections to this revolve around a fundamental question - when does a group of cells constitute a human life? Put simply, are we playing God, and it is morally acceptable for us to do so? There has been no definitive conclusion, and the argument continues.\n\nThe variety of diseases which can potentially be treated with ESCs is huge, ranging from degenerative disorders such as Parkinson’s disease, to diabetes, and even cancer. If successful, it could be the greatest reliever of human suffering since the introduction of antibiotics. However,\nthe moral arguments surrounding their use do not look set to be resolved any time soon. Regardless, the immense potential medical benefits cannot be ignored, and so research continues amidst the controversy.
775861
After conception, the single fertilized egg begins to multiple and divide. Up to a point all of the cells are identical. That is why it is possible to have identical twins.  If at some point the dividing cells increase their number so suddenly that a section of cells actually get  bumped away from the main body of cells the second set of cells are identical to the first. If that second set can attach to the wall in time it will develop into an identical twin.\n\nAt this point the identical cells are called STEM cells. They have no individual identity and they are completely interchangeable.  \n\nIt is a mystery that still puzzles researchers as to how the "triggers"  turn on to tell one area of cells to become brain, another liver, another lungs, etc.  But they do.  The really amazing thing about that is that the body produces those cells even after we are born. I believe it occurs in the bone marrow.\n\nResearchers are trying to find ways to coax those stem cells out of our body and place them into damaged areas to create new cells. Stem cells inserted into a dieing pancreas will become pancreas cells because they take on the identity of whatever cells they come into contact with.\n\nThey could be inserted into a diseased heart or lungs, or liver to grow new healthy cells.\n\nThey all carry the same genes because they come from the same donor. \n\nIt truly is a mystery....