Ukuthuthukiswa ongaqondile kuyisici sobuntu ... ongaqondile Postembryonic Development: Izibonelo

Ukuthuthukiswa kuyinto isici esibalulekile ekuphileni. Luqala ngokunikela iqanda eselivundisiwe futhi iphela ahambisana nokuthomba. Ukuze kwezikhathi zokulotshwa embryonic libhekene ukuthuthukiswa nenkhulumombiko. ukuthuthukiswa Direct - yinqubo yemvelo lapho amaningi luyakhula futhi ikhuphuka, sibe nzima inhlangano yabo. Lesi simo esiyingqayizivele sibangelwa kuyinto ejwayelekile womuntu, izinhlanzi, izinyoni nezilwane ezincelisayo.

ukuthuthukiswa ongaqondile - inchubo lapho umbungu ku ovuthiwe ukuzibandakanya umuntu esigabeni elalikudle lapho liseyisibungu, ephelezelwa baye bathi sebeshintshe ngokuphelele. Lokhu kwenzeka, isibonelo, ezingenamgogodla kakhulu nezilwane eziphila ezweni.

isikhathi Ikakhulukazi post-embryonic

Amaphiriyodi yentuthuko post-embryonic ephelezelwa izinguquko izici morphological, imikhuba kanye izindawo. Ukuqondisa ukuthuthukiswa kwesici isici ukuthi ngemva kokuzalwa umbungu ikhophi amancane omdala, futhi uhluke kuphela ngobukhulu kanye ukungabikho izici ezithile zitholwa kuphela isikhathi. Isibonelo kungaba ukuthuthukiswa yomuntu, izilwane kanye ezinye ezihuquzelayo. ukuthuthukiswa ongaqondile esivamile ezingenamgogodla, mollusk nezilwane eziphila ezweni. Kulokhu, i-fetus iyakwazi umehluko omkhulu uma kuqhathaniswa izilwane omdala. Njengoba isibonelo butterfly abavamile efanelekayo. Kuphela ngemuva kokuthi kuzophothulwa izigaba eziningana ukuthuthukiswa, kuphuma iqhimiza elinemilenze encane siguqulwe angaphezu ukuqashelwa.

izinkathi ukuthuthukiswa

Izinkathi ukuthuthukiswa post-embryonic zihlanganisa esigabeni juvenile ukuvuthwa nokushwabana.

• isikhathi Juvenile ihlanganisa isikhathi kusuka ekuzalweni kuya nokuthomba. Lesi sinyathelo lilandelwa lithathelwe imvelo entsha. Kuyaphawuleka ukuthi izilwane eziningi nezilwane ezihuquzelayo, izimpawu indlela eqondile ukuthuthukiswa post-embryonic, ithuthukiswe ngendlela efanayo. Umehluko kuphela ngokuqondene nesikhathi esishiwo. Iqeda inkathi yokuthomba.

• ukuvuthwa inkathi ebizwa ngokuthi esigabeni zokuzala, libhekene ngovimba ukukhula. Emzimbeni kukhona self-ukuvuselelwa izakhiwo ezithile futhi ukuwohloka kwabo kancane kancane.
• ukuguga inkathi deceleration kulandele izinqubo nokunciphisa. Ngokuvamile, ukwehla kwesisindo emzimbeni uyalandelwa. Uma kube khona kokungenela zinamandla, ukufa yemvelo kwenzeka lapho izinhlelo ezibalulekile ngenxa ingasheshi zonke izinqubo phezani umsebenzi.

Ongaqondile ukuthuthukiswa: izibonelo izigaba

Ake sibheke indlela kuphakama ukuphila esikhathini uyisidalwa esisha. ukuthuthukiswa nenkhulumombiko - a term echaza izinqubo ezihlukahlukene yezilwane, oqala Iqanda elivundisiwe. Phakathi ukuthuthukiswa post-embryonic ekugcineni kwakhiwa isitho izinhlelo, kukhona ukukhula, nokuvuthwa zocansi , kulandelwa kumdlalo we izinhlobo. Okulandelayo ukuguga, futhi ukungabi khona kokungenela zangaphandle kufika ukufa yemvelo.

• Ngokushesha ngemva kokuzalwa iqala uchungechunge kugucuka. Ngalesi sikhathi kancane sihluke yomzimba womuntu omdala kokubili ngaphandle futhi ngaphakathi.
• Eyesibili esiteji - ushintsho ku-umzimba entsha ngokuphelele. Metamorphosis - izinguquko postembryonic esimeni sokwakheka komzimba ne kushintshana izigaba eziningana.
• Isigaba sesithathu - esigabeni sokugcina, okuyinto iphela ukuthomba nokuzalwa kwabantu.

Izici Zabantu engaqondile

ukuthuthukiswa ongaqondile sici eziphilayo ezinamangqamuzana amaningi. Of ayilibalanga Iqanda isibungu, okuyinto ngaphakathi nangaphandle akafani nomuntu omdala. Ngokusho isakhiwo kuyinto ikhemikhali ngaphezulu inkimbinkimbi, ivame ukuba kokuba ngokulungiswa okuncane. Umbala wawo, kungaba ukude efanayo oyise ezikude. Isibonelo kungaba le amphibian isibungu ezifana frog.

Ngaphandle, le ngunoshobishobi kakhulu okusikhumbuza inhlanzi encane. Ngenxa izitho ekhethekile elalikudle lapho liseyisibungu, yena Ungaphila impilo ehluke ngokuphelele ukwedlula zezinhlobo ovuthiwe. Ngisho esingesihle ubulili umehluko ungakakwenzi, ngakho nengxenye izibungu azikwazi esikalini. Ngo inombolo ethile zilwane, lokhu komqondo nezinga lokukhula kwengane ithatha ingxenye enkulu yezimpilo zabo.

I baye bathi sebeshintshe ngokuphelele olukhulu

Ngo ukuthuthukiswa ongaqondile isilwane osanda kuzalwa wehlukile ifomu ovuthiwe inombolo yezici yokwakheka. Embryo amabhu kusukela amaqanda ifomu izibungu okuyinto asitholayo yokuguqukela kwesinye isimo olukhulu ngaphambi kokuba afinyelele omdala yayo esiteji. ukuthuthukiswa ongaqondile kuyisici sobuntu izilwane amaqanda amaningi. Lezi ezinye echinoderms, izilwane eziphila emanzini nasezweni kanye izinambuzane (izimvemvane, ojekamanzi, amaxoxo nokunye). Lezi ziphungumangathi zasondela salezi zidalwa ngokuvamile ezahlukene ngokuphelele isikhala emvelweni ngaphandle isilwane omdala. Zidla, ikhule futhi esikhathini esithile siguqulwe isilwane omdala. Lezi yokuguqukela kwesinye isimo global ephelezelwa izinguquko eziningi bokuphila.

Izinzuzo nezingozi nebubi yentuthuko oqondile

Plus ukuthuthukiswa ngqo ukuthi ukukhula kudingeka amandla ingasaphathwa kanye izithako ezibalulekile, njengoba kungekho rearrangement global ingekho emzimbeni. Yini embi ngalo wukuthi ukuthuthukiswa umbungu idinga inothile umsoco amaqanda noma brooding esibelethweni.

Isici negative Kuyaphawuleka ukuthi phakathi izilwane ezisencane futhi omdala kungase kube mncintiswano ohlotsheni oluthile lwento ephilayo njengoba yazo futhi imithombo ukudla ziyafana.

Izinzuzo nezingozi engaqondile

Ngenxa yokuthi izinto eziphilayo yohlobo ongaqondile abahlala ezahlukene niches emvelweni, umncintiswano phakathi izibungu futhi abadala ngokuvamile kwenzeka yini. Inzuzo kubuye yokuthi izibungu izidalwa sedentary yiba nesandla ekulandiseni endaweni kwengqondo kwendawo yayo. Phakathi bokwenza kubalulekile ukucacisa ukuthi ukuthuthukiswa ongaqondile izilwane azifake omdala kuvamise ukuthatha isikhathi eside. Ukuze kugucuka qualitative kudingeka semali nomsoco kanye namandla.

Izinhlobo engaqondile

Lezi zinhlobo ezilandelayo ukuthuthukiswa engaqondile: yokuguqukela kwesinye isimo okugcwele esinqunyiwe. Ukuthuthukiswa egcwele engaqondile ukuguqulwa sici izinambuzane (amabhu, mabhungane, abanye Hymenoptera). izibungu achanyuselwa eqala ukudla ukukhanya, zikhule bese ziba imifece esinqunyiwe. Kuleli zinga, zonke izitho zomzimba sokudiliza, okuholela impahla yeselula nezakhi zanqwabelana kukhona isisekelo ekwakhekeni emizimbeni ehluke ngokuphelele, nobuntu umzimba omdala.

yokuguqukela kwesinye isimo kwengxenye engaqondile ukuthuthukiswa postembryonic sici for zonke izinhlobo kwezinhlanzi nezilwane eziphila ezweni, ezinye izinhlobo zama-worm, mollusk nezinambuzane. Umehluko omkhulu kusukela ukuguqulwa okuphelele kuyinto engekho esiteji umfece.

Iqhaza begazi esigabeni elalikudle lapho liseyisibungu

Isigaba elalikudle lapho liseyisibungu - kwenkathi ukukhula asebenzayo futhi isitoreji izakhi. Ukubukeka ngokuvamile sihluke kakhulu ifomu omdala. Sinenkosi siqu izakhiwo zabo esiyingqayizivele nemizimba, ezingenakho abantu ukuvuthwa. Ukudla kwawo kungase kwehluke. Izibungu zivame ingashintshwa ukuze imvelo. Ngokwesibonelo, tadpoles siphile ninodwa emanzini, kodwa ukuphila ezweni, njengoba i frog omdala. Ezinye izinhlobo zawo esigabeni omdala benzelwe, ngenkathi izibungu zabo ethutha njalo futhi usebenzise lesi amandla ezihambayo ekwandiseni kwendawo yemvelo ndawo.