Embryo

From Biocrawler, the free encyclopedia.

For musical bands with the name "Embryo" see Embryo (band)

An embryo (Greek: έμβρυον) is an animal or a plant in its earliest stage of development.

• Plants: In botany, a plant embryo is part of a seed, consisting of precursor tissues for the leaves, stem (see hypocotyl), and root (see radicle), as well as one or more cotyledons. Once the embryo begins to germinate — grow out from the seed — it is called a seedling.

• Animals: The embryo of vertebrates is defined as the stages between the first division of the zygote (a fertilized ovum) until it becomes a foetus. An embryo is called a foetus at a more advanced stage of development and up until birth or hatching. In humans, this is from the eighth week of gestation.

• Stages: morula-> blastula->gastrula.

See also

• Embryogenesis
• Embryology
• In vitro fertilization
• Plant embryogenesis
• Embryo space colonization

External link

• Chart of human development (http://www.genefaith.org/ethgen/pages/databases/resources/humdevchart.html)

es:Embrión

fr:Embryon (biologie) it:Embrione ja:胚 lt:Gemalas nl:Embryo pl:Embrion pt:Embrião sv:Embryo

Wikipedia (http://en.wikipedia.org/wiki/Main_Page) Embryo (http://en.wikipedia.org/wiki/Embryo) version history (http://en.wikipedia.org/w/index.php?title=Embryo&action=history) GNU Free Documentation Lizenz (http://en.wikipedia.org/wiki/Wikipedia:Text_of_the_GNU_Free_Documentation_License) CC-by-sa (http://creativecommons.org/licenses/by-sa/2.5/)

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