Embriogeneza

Embriogeneza

Embriogeneza (lat. embryogenesis) je proces razvoja, tj. inicijacije, gastrulacije, tkivne diferencijacije i organogeneze embrija (embriona, zametka). Počinje spajanjem ženskog i muškog haploidnog gameta (inicijacija) u diploidni zigot. Zigot karakterizira intenzivna sukcesija mitotskih dioba, geometrijskom progresijom.

U fazi gastrulacije nema uočljivog rasta njegove biomase a nakon toga, osobito tokom diferencijacije i organogeneze, ona intenzivno raste[1][2].[3]. Kod sisara, embrionalni stepen prelazi u fetalni (koji se okončava rađanjem nove jedinke). U biljnom i životinjskom svijetu je uočeno mnoštvo različitih nijansi ovog procesa, ali sve one u suštini imaju istovjetan i početak i kraj, tj. početak rasta i razvoja novog organizma[4]

Reference

  1. ^ EMBiology
  2. ^ Gilbert S. F (2000): Developmental Biology, Sinauer Associates, Sunderland (MA); ISBN 0-87893-243-7.
  3. ^ Dudek R. W., Fix J.D. (2010): Embriology. Board Review Series, Wolters Kluwer Health, Lipincott Wiliams&Wilkins, Riverwoods (IL), ISBN 1605479012.
  4. ^ Raven P. H., Johanson G. B. (1999): Biology. WCB/McGraw–Hill, New York.

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