Embryo
| of these articles is occupied with the organism embryo; to German skirt volume of the same name see embryo (volume). |
that or the embryo (Greek έμβρυο [neutrally]), also the germ or that Keimling,an organism is in the early form of the development.
With higher plants the embryo consists of Keimwurzel (Radicula), branch bud (Plumula) and Keimblatt (Kotyledon) and/or Keimblättern (Kotyledonen). In the context of germinating develops from itthat Keimling.
With animals the organism developing again from a fertilized Eizelle (Zygote) is called embryo, as long as it is in the dam or in a Eihülle or a Eischale.
With humans the embryo becomes afterTraining of the internal organs starting from the ninth pregnancy week as Fetus (also Fötus written) designates.
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legal aspects
in the iurisdiction the term embryo however differently one uses.Like that the research with human embryos is in some countries up to 14. Life day permits. Up to this time according to at present valid definition criteria still no individual humans developed, there the formation of the primitive strip of the central nervous system only after that14. Development day takes place. Some researchers speak therefore in the first life days of an embryo of a präembryonalen stage or a Präembryo, not however of a genuine embryo. From this the iurisdiction derives a weakened obligation, the life of the embryo toto protect there.
Animal and human embryos are often used by the science for experimental purposes. For the medical research from human embryos and driven off Föten for example main cells are won. In some countries that is certified therapeutic clones. To the justificationthe mostly following arguments are stated:
- Up to 14. Day does not give it with human embryos individuality.
- From it result that the life protection on this early Embryonalstadien does not have to be so highly set, as in the case of a human organism, in the case of thatthe individuality is certain, because the use of the experiments cells for mankind, embryonalen on , is to be evaluated more highly.
- If the experiments are forbidden in the own country, they were made in other countries, so that it for reasons of the scientific progressis more favorable to permit the attempts in the own country.
The Austrian reproduction medicine law of 1992 and the German embryo law for the protection of 1990 permit neither the therapeutic to clones nor the use of embryos for therapeutic purposes. In Germany since then one discusses intensively,whether the research with embryonalen main cells should be permitted not nevertheless.
literature
Erich Blechschmidt: How does the human life begin? From the egg to the embryo. To stone on the Rhine, 1989, ISBN 3-7171-0653-8
