Human embryo budiriro

Development of mudumbu mukati womukadzi pachizvaro ine zvikamu zvitatu.

The zvokukura embryo kukura.

Wekutanga nguva inotanga kana kupinda mukati uterine mhango pakati ovum uye anoramba yose vhiki yokutanga. Panguva iyi embryo kuvandudzika munhu kunosanganisira bogmærke chikuru zvomukati, paumbwe extraembryonic gadziriro kuti vakazoroorwa nechokwadi kuvapo mudumbu kuti dzidzo zvizere zvose hurongwa nenyere.

Nokuti chikuru Kuda kutamba ari dumbu iri ovum kuti kushingaira kukura kwayo. Kuvakwa Sero akaturikidzana - hwaro iyo zvomukati chichagadzirirwa pashure. Power zai anowana kuburikidza Kuparadzwa masero ari endometrium pamusoro embryo masero. Saka, fetus zvinofamba zvakadzama kupinda mhango uye yakasimbiswa mairi. Kazhinji Full accession apedzerana nezuva regumi namaviri pashure muchangosangana.

Uyezve, sero gobvu anotanga kuwedzera zvinokosha, zvinonzi kwoita machira maviri: zvemukati (endoderm) dzokunze (ectoderm) embryo shizha. Pashure nevhiki gestation kuumbwa mesoderm rechitatu - wechitatu mashizha, iri pakati vamwe vaviri. Kukura embryo kwevanhu, kunyanya kwayo nhengo dzomukati somugumisiro chichaitika kubva izvi utachiona akaturikidzana.

The ectoderm ndiyo hwaro paumbwe mazino enamel, okumusoro akaturikidzana ganda, peripheral (nodes) uye nechepakati (uropi uye musana) tsinga. Vakaisa uye pfungwa (kuona uye kunzwa, olfactory uye gustatory nzvimbo muviri).

Yomukati Sero rukoko (endoderm) ndiyo hwaro paumbwe kufema uye zvomudumbu nehurongwa.

Mesoderm munyaya paumbwe zvetsandanyama nemapfupa, zvemwoyo, excretory, uye kubata pamuviri hurongwa.

Embryo budiriro rokutanga munguva zvinosanganisira kwevanhu muchitokisi kugovera. Mumwe wavo anoumba chorion - chikuru fetus membranes. Chorion villi akafukidzwa diki kuti vakazoroorwa kurai lining pamusoro dumbu uye nokudaro kuumba placenta. Chimwe chikamu sero munyaya pakusika extraembryonic nhengo.

Embryo kusimudzira kwevanhu inofamba mu danho rechipiri vhiki wechipiri. It akadana embryonic nguva. Ramba danho iri mushure memwedzi miviri gestation. Munguva iyi, pane nokuumbwa nhengo dzose dzinokosha.

Nenguva iyowo kuumba chikuru midziyo ropa. Kubva musoro nharaunda embryo masero kutamira mukati chikamu pakati yomukati dzokunze muchitokisi rukoko. Zvinoguma utachiona Chord.

Pfungwa inokosha nokuda yechipiri nguva ndiyo paumbwe placenta kubva chorion.

Kubva repfumbamwe vhiki pamuviri uye kusvikira mwana aberekwa vokupedzisira wechitatu - fetus - kumwedzi. Human embryo kukura panguva ino kunoratidzwa ne kubudirira zvizere kukura dzose zvivako muviri aumba.

Kubva rechipfumbamwe vhiki akatanga kukudziridza kuti kwemakemikari anobudiswa hurongwa. An awedzera Kugadzirwa mahormone zvakakodzera kuti kukura. Kukosha ndiye jekiseni. Panoperera mwedzi wechitatu rinoguma nemashoko kuibvisa iri placenta, rinova kutanga kubudisa pachake mahormone ayo.

Kuenda Kugadzirwa uropi yakura madhipatimendi izvo zvinobatanidzwa kufamba azvarwa wokutanga.

Hurongwa dzidzo zvirwere kunoguma regumi namasere vhiki fetus. muviri wemwana zvaanopa simba masero machena eropa kukudziridza. Yakabudiswa uye zvinoriumba anoumba tinozvarwa rokuzvidzivirira fetus - interferon uye immunoglobulin. Chirwatata anotanga kushanda.

Kuchinja kukosha mune pulmonary ino musiwa vhiki maviri namana. Achigadzira pouches chinouraya izvo zvinova zvinoita kuti vaite mweya.

In wechinomwe mwedzi gestation pane kukura tsandanyama uye mapfupa muviri, saka kuti muviri wemwana kwava kupfuura musoro wake.

Mumwedzi basa kufuta repfumbamwe kunoitika. The mwana iyi inova renguva izwi uye vakura.