with nutrition (sustenance), was "requisite to the Bildungstrieb but not by any means the Bildungstrieb itself", as the vital power existed even where there
epigenesis in the life sciences in 1781 with his publication of Über den Bildungstrieb und das Zeugungsgeschäfte. Blumenbach cut up freshwater Hydra and established
Kant with Johann Friedrich Blumenbach proposed a "developing drive" or Bildungstrieb, a concept related to self-organization. Naturalists of the late 18th
in the nervous system. Reil also wrote on Blumenbach's idea of the Bildungstrieb (literally, "building power"), a vital force within each organism that