Embryo kukura

Mumwedzi 9 kubva pakuberekwa kusvikira pakupera kwekuita pamuviri, mwana anowedzera. Vadzidzisi vezvipembenene vanoparadzanisa nguva yehutumbi mumumishinari uye nguva yekubata. Kubudirira kwemu embryo uye fetus inzira yakasiyana-siyana yemagariro, iyo inofadza kwete chete kuvarapi, asiwo kune vanaamai vari mberi. Vakadzi vane pamuviri vanoda kuziva zvakawanda sezvinobvira kuti vana vavo ramangwana vanokura sei.

Nhanho dzekukura kwemuviri wemunhu

Nguva yekumbryonic inotora kwemavhiki masere, inopfuura mumatanho akawanda.

1. Zuva rokutanga kubereka kweii nehuta hunoitika.
2. Ipapo inotevera nzira yekupwanya, iyo inotora kwemazuva mazhinji. Munguva iyi yekukura kwekuberekwa, sero rimwe nerimwe rinopatsanurwa uye sechikonzero, zvinonzi blastula inoumbwa. Inobva kumasero ayo ayo trophoblast, ndiko kuti, nguva yemberi placenta, uyewo embryoblast-ramangwana mwana-ichaonekwa mukuguma.
3. Anenge vhiki imwe mushure mekubata pamuviri, kushandiswa kunotanga, izvo zvicharamba kwemazuva maviri.
4. Mumazuva manomwe anotevera, chirwere chinogadzirwa chinogadzirwa. Kubva kuEctoderm (kunze kwekunze kwe embryoblast), ganda uye nervous system inotanga kukura. Kubva kumucheto wakadzika, kana entoblast inoita chirwere chekudya, chirwere chokufema. Pakati pezvikamu zviviri izvi ndeye mesoblast, iyo iyo, inowedzerawo, inokonzera masaga, masimba, circulatory system.
5. Kubvira pamasvondo matatu kukurudzirwa kwezvirongwa zvose zvehutumbi hwemunhu hunotanga. Uye kutanga kwemwedzi wechitatu, majeremusi ezvimwe nhengo dzomukati akaumbwa.

Uyezve, mucheche uchangobva kunzi "fetus".

Nguva dzinonetsa dzekuberekwa kwemukomana

Munharaunda yose yekutora nguva, amai vakamirira vanoda kubhadhara zvakanyanya kuhutano hwake. Mushure mezvose, mamiriro emwana wacho zvakananga kubva pane izvi. Asi pane mamwe mapato apo mukadzi anofanira kuchenjerera.

Saka imwe yezvikamu zvakadaro mu embryonic stage ndiyo nguva yekuisa , izvo zvingasazoitika nekuda kwezvikonzero zvakawanda, somuenzaniso:

• nekuda kwekushingaira muviri, pamwe nekusimudza zvisikwa;
• nekuda kwehutachiona hutachiita mukati mechibereko;
• semugumisiro wekutsvaga kune zvinhu zvine chepfu, zvinodhaka, zvinodhaka;
• nekuda kweimwe zvirwere.

Iyi inotevera inokosha inokosha yekusimudzira uye kukura kwembryo ndiyo nguva kubva pa5 kusvika kuvhiki masere. Kubvira panguva iyoyo zvikamu zvose zvinokosha zvakasikwa, pamwe nechemberi yembilical, saka zvinokosha kuedza kuve nechokwadi kuti hapana zvinokuvadza zvinokonzerwa nemuviri wemukadzi ane pamuviri. Kana zvisina kudaro inogona kukanganisa zvakanyanya mamiriro ehutano emakumbo.