ONTOGENETIC • DICCIONARIO INGLES.COM • Definition of Ontogenetic

... the point of extravasation to irrigate newly growing fibers, cells, and organs which atrophy if not thus fed. When maturity is complete this need abates. If this be correct, the phenomenon of second breath, so characteristic of adolescence, and one factor in the inebriate's propensity, is ontogenetic expression of a rhythm trait of a long racial period. Youth needs overexertion to compensate for underexertion, to undersleep in order to offset oversleep at times. This seems to be nature's provision to expand ...

— Youth: Its Education, Regimen, and Hygiene • G. Stanley Hall