Four words and their meanings are crucial to understanding these complex issues in a simplified way: organ, organism, form, function.
A sperm or ovum is produced in an organ, a substructure of an organism. Organism is the whole being, organ is a substructure. An embryo is an entire organism at earliest age. The embryo begins cell differentiation very soon upon cell division commencing (building the first ORGAN for his or her survival, called the placenta). The process of embryonic growth is one of form ... the fetal body is formed, then function follows (just as the placenta is formed then begins functioning to exchange gasses and nutrients for the alive embryo that then begins building the body of organs which will support the continuing life once the being exits into the air world)). If embryo stem cells are harvested and used on fully formed humans, these formational stem cells tend to form and form and form, without differentiating into function!
Parkinson's patients injected with fetal stem cells(embryo stem cells) have grown tissue not meant to be located in the brain, and death has followed such abnormal formation. The process of cell differentiation is actually one that continues throughout a lifetime, as repair cells function to replace and support damaged tissues. Stem cells (called MAPCs, for multi-potent adult progenitor cells) are produced in various parts of the body, stem cells that are ready to differentiate into specific tissues when located to a particular formational site, influenced to turn into the tissues of that particular site by enzymes and other influences particular to that formational position in the formed body.
The research with embryonic stem cells (earliest fetal body parts) is undertaken as a means to use cloned embryos/fetuses for harvesting histamine matched functional tissues. Even the researchers admit they look forward to 'therapeutic' cloning in order to conceive embryos as tissue twins to the DNA donor. Cloning is intimately connected to the direction embryo stem cell exploitation wants to go. If the world can be brought along into the cannibalism of 'to be discarded' alive embryos in fertilization clinic freezers, then human cloning will be much easier to slip into place, to slip into acceptance by an uneducated (uneducated as to the technicalities), secular people.
Killing embryo AGED individual human ORGANISMS, for their body parts, is cannibalism as surely as it would be were the embryos placed upon crackers for curative snacks.
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