Embryogenesis

Embryo budiriro hunotanga pakunambwa uye panoberekwa munhu panyika. Kazhinji Natal kukura inoumbwa 2 maitikiro: mwedzi miviri yokutanga - embryo, uye hunotevedzana (3-9) vanonzi fetus. Natal budiriro rinovapo anenge 280 mazuva, kana 9 months. Embryo obstetric tsika anonzi mudumbu, iyo anova mumuviri inenge mwedzi miviri, ipapo embryo chinonzi mudumbu.

Embryo kukura kubva pakusangana kusvikira pakuberekwa

Muscular epithelial mumuhara ipfupi, zvichiita zai kufamba akananga fallopian chubhu dzisingaoneki, mukono utachiona masero. Somugumisiro, muchangosangana kunoitika. Zai anogona kupindira dzisingaoneki rimwe chete, uye ipapo kumativi zvinoratidzika unodzivirira goko kuti kunotadzisa kuti ingress vamwe dzisingaoneki. Embryo kukura rinotanga pamwe Fusion pamusoro nuclei maviri wezvamatongerwe dzakananga vanochengeta okutodza. Pashure rinotanga ekare zvokukura mudumbu kukura, inova masero rwakakamukana dzakawanda vaduku.

Nembudzana anodya mondo reserves, vari zai. Kwapera nguva embryo anopinda dumbu uye kuda kunoitika, kana muchibereko. Nechekare pazuva 7th zuva mwana ari zvishoma nezvishoma chakaunzwa muchibereko chemusikana. Zvadaro, embryo anotanga kubudisa chorionic gonadotropin, hormone, ndicho chiratidzo kuna mai okuparadza pamuviri (kureva, rinopa chimiro mapoka maviri bvunzo).

10-14 zuva mudumbu, kukura iyo yakaitirwa zvisingatomboiti kumhanya, zvinova zvinopfuura 2 nguva. Next embryo budiriro kunoitika nokukurumidza kutsanya. Tsinga anotanga kuumbika kare pazuva rechi20 pazuva pamuviri. Pashure pevhiki nhatu, nomwana mwoyo anorova. Nokuti mazuva anenge 28, mumwe nomuzongoza uye tsandanyama. Achibatsirwa Ultrasound zvinoonekwa maoko, makumbo, nzeve uye meso mwana.

Mumazuva 30 chete, pakukura kwomwana kwakawedzera zviuru 10 nguva, uye anoramba kukura nokukurumidza. Mazuva mashanu pashure paizvozvo kuoneka minwe pamusoro maoko nemakumbo, maziso rima sezvo muviri mwana hwapedyo rinokosha ruvara.

Kwenguva 6 mavhiki, uropi anotanga kudzora kufamba mwoyo uye tsandanyama embryo. Chiropa unobereka masero eropa. Pashure imwe vhiki ikoko nokusingaperi mwana, izvo zvinodzivirira maziso kubva kuoma uye chiedza. Panguva iyi pamuviri ari kushingaira matongosika wokunze uye yomukati nzeve mwana zino primordia simuka uye kutanga kutora chimiro shaya. Zvisinei, chinonyanya kukosha uye kuchinja ndechokuti murume atanga kufamba mudumbu. Sezvineiwo, iye muduku kuna mai akanzwa perturbations izvi.

8 mavhiki - chinhu chinokosha inokosha kukura kwemwana. Panguva iyi okukura, yatova anotarisa somunhu. saizi Its ndiyo chete 2, 5 masendimita, uye zvishoma nezvishoma achizvirova mwoyo, akaderedza tsandanyama, munhu anowana mamwe maitiro, uye muviri anoonawo kubata. Pashure 2 weeks mwana anokura 4 masendimita uye hunorema anenge magiramu maviri. Nguva iyi kunoratidzwa nokuumbwa sikarudzi nomwana.

Pamasvondo 12 akanga yakayamwa munwe wake uye nesimba anorovedza tsandanyama. Baby anotanga kutsausa musoro wako, rerekai minwe yako Pazvibato, kuvhura uye kuvhara muromo. On ichi mudumbu izwi anoona uye anonzwa, zvimiti munzeve dzake maererano unopinza ruzha uye anobva yakajeka danda wechiedza. Between 16 kusvika 24 pavhiki vanoshingaira kuchinja kuitika acho nechitarisiko bvudzi, cilia. Baby achinyemwerera, hiccups, uye amai anonzwa izvozvo zvakanaka. Kubva vhiki 24 pamusoro 34th embryo kukura koda wakakwana, mwana atova akasununguka anotaurawo manzwiro (mufaro, hasha, kutsamwa). Iye anogona kuona zviroto. The mufananidzo chinoratidza inflated chipanji kana kunyemwerera. Mavhiki 36-38 ndeyekupedzisira kukura mwana pechikuva. Zvino akagadzirira aberekwa.