Kanjani ukuthuthukiswa postembryonic eziphilayo ezinamangqamuzana amaningi

Ngemva umzimba azalwe, ke kuvela ukuthuthukiswa postembryonic ukuthi ingahlala kusuka 1-2 days ngemva kwamakhulu ambalwa - konke kuncike zilwane. It kulandela ukuthi bungakanani ubude bokuphila umlingisi ezithile zonke eziphilayo, kungakhathaliseki ezingeni inhlangano enjalo. ontogeny nangemuva kokuzalwa komntwana kuyinto lezinkathi ezifana: juvenile pubertal futhi senile, okuyinto uphela ekufeni. Zonke izinto eziphilayo ezinamangqamuzana amaningi angaphansi uhlobo ngokuqondile noma ngokungaqondile yentuthuko.

Qondisa ukuthuthukiswa izimiso

ukuthuthukiswa Post-embryonic kukhona ngokucacile isici ezincelisayo, ezihuquzelayo, izinyoni, izinambuzane futhi abanye, yebo, indoda. Ngo uphawu lokugcina lobo ukuthuthukiswa:

- ebuntwaneni;

- usakhula ;

- usakhula;

- Isigaba kwentsha;

- esigabeni ukuvuthwa;

- yokuguga.

isikhathi ngasinye sihambisane izinguquko ezithile ukuthi ziholela yokuguga nokufa umzimba. Kufanele kuqashelwe ukuthi esikhathini senile kwenzeka sebuningini izinqubo morphological bokuphila eziholela ukwehla ukuzinza kanye ubungqabavu umzimba ukuba imiphumela emibi izici zangaphakathi nezangaphandle. izindlela ezinjalo, ngeshwa, akukaqondwa ngokugcwele, ngakho-ke abakwazi kungavinjelwa ngemishini.

Ukufa evala postembryonic hhayi kuphela ukuthuthukiswa, kodwa futhi ngamunye khona umzimba. Kungaba uhlobo bokuphila, okusho zenzeka ngenxa yokuguga, kodwa futhi kwenzeka ngenxa izinguquko sokugembula, umphumela okuyinto evame ezihlukahlukene izifo noma ukulimala.

Izici yentuthuko engaqondile

Ongaqondile ukuthuthukiswa postembryonic kwenzeka kuphela izilwane ezinamangqamuzana amaningi futhi esibonakala ngokuqina ukuvela izibungu kusukela Iqanda - embryo, okuyinto ngokuphongoza e isakhiwo kusukela abadala, kodwa uyakwazi kakade ukudla ngokuzimela. Ngaphandle, isibungu Yiqiniso, ungaba zifana ezikude oyise, kodwa isakhiwo salo lula kakhulu, futhi ubukhulu lincane kakhulu. Ngo-embryo kukhona ethize izitho zangaphakathi, okuvumela ukuba uphile ukuphila obhekene naso sehlukile kuleso eziholela abadala zohlobo olulodwa. Nokho, isibungu lingekho ngokuphelele izici ngokobulili esingesihle, ngakho kulesi sigaba kuyinto engenakwenzeka ukunquma ubani uzoguqula - e owesilisa noma owesifazane.

Ongaqondile ukuthuthukiswa postembryonic lisikisela ukuguqulwa ngokujulile umzimba ezenzeka phakathi nayo yonke inkathi. Ezilwaneni, lezi zinqubo musa kuthinte kuphela ezingxenyeni ezithile zomzimba, kodwa umzimba wonke iyonke. Ngokuhamba kwesikhathi, izidumbu izibungu zinyamalale, futhi esikhundleni sabo kukhona imizimba okuyizinto eziyizici izilwane omdala. ukuthuthukiswa Post-embryonic kwezilwane kungaba izinhlobo ezimbili: ngenze ushintsho olukhulu kakhulu futhi akuphelele. Esimweni sokuqala isinambuzane sihamba izigaba ezifana: amaqanda, isibungu, abadala, kanti eyesibili - isibungu ukuguqulwa kusimo omdala ngokugcwele kwenzeka ngokusebenzisa isigaba pupal.