the embryo is killed
the embryo dies
Yes and No. The only big difference is the procedures used in harvesting adult stem cells is considered legal and safe. There's no need to kill a human embryo. Adult stem cells can be harvested from cord blood or human bone marrow. But embryonic stem cells are able to make more kinds of cells than adult stem cells.
Stem cells are removed just after conception when the zygote is forming into an embryo. When stem cells are taken, the embryo cannot develop, and so does die.
The main controversy is whewn stem cells are harvested from aborted fetuses, or when an egg is fertilized in a laboratory for the sole purpose of harvesting stem cells. Stem cells can also be gotten from umbilical cord blood after a baby is born.
Adult stem cells are harvested from newborn's cord blood or human bone marrow while embryo stem cells come from the inner cell mass of a human embryo. No fetus is killed to use the stem cells, but the embryo cannot function and must be destroyed without a inner cell mass.
the embryo dies
Cord blood stem cells come from a newborn's umbilical cord while embryonic stem cells are harvested from a human embryo. Although the procedures involved in harvesting it are totally different. A doctor can immediately removed a newborn's umbilical cord and squeeze out those stem cells. Getting stem cells from the embryo requires to kill a forming fetus inside the womb and this procedure is considered unacceptable.
Yes and No. The only big difference is the procedures used in harvesting adult stem cells is considered legal and safe. There's no need to kill a human embryo. Adult stem cells can be harvested from cord blood or human bone marrow. But embryonic stem cells are able to make more kinds of cells than adult stem cells.
Stem cells are removed just after conception when the zygote is forming into an embryo. When stem cells are taken, the embryo cannot develop, and so does die.
Both of them are effective and can cure life-threatening diseases like leukemia and other forms of cancers. The big difference is there is a need to kill an embryo to harvest its stem cells, which is unacceptable, while adult stem cells can be harvested from a newborn's umbilical cord and bone marrow.
it is used until it dies or cannot supply any more healthy stem cells, then it is....disposed of. if u get my drift :(
The main controversy is whewn stem cells are harvested from aborted fetuses, or when an egg is fertilized in a laboratory for the sole purpose of harvesting stem cells. Stem cells can also be gotten from umbilical cord blood after a baby is born.
Adult stem cells are harvested from newborn's cord blood or human bone marrow while embryo stem cells come from the inner cell mass of a human embryo. No fetus is killed to use the stem cells, but the embryo cannot function and must be destroyed without a inner cell mass.
There are more cells found in an embryo than an adult.
In order to obtain stem cells, an embryo must be in the blastocyst stage.
Three types of stem cells in adults are hematopoietic stem cells, mesenchymal stem cells, and neural stem cells.
you do!