Kutora ropa kuwedzerwa

Chinhu chose chakakosha kuti intrauterine kukura uye kubudirira kwecheche inouya kwairi, zvakananga kubva kuropa raamai kubva pamascenta, apo kutaura kwemaviri emiromo yeropa - amai nemwana - inoitika. Kutenderera kuburikidza ne-placenta kunotanga kumativi ekuguma kwemwedzi wechipiri wehupenyu hwusita. Muchiitiko ichi, kupararira kweropa kwe fetus kune maitiro ake.

Ndezvipi zvinokonzerwa nekupararira kweropa mumucheche?

Nokudaro arterial, ropa rinotakura okisijeni kumucheche, rinouya kwaari zvakananga kubva kune placenta kuburikidza nembilical vein. Iyi mutsara mumutsara wembilical, pamwe nemaminiti maviri embilical, inotakura ropa kumucheche kubva pamakona.

Zvadaro, mumutumbi wemuviri, umbilical vein inoparadzaniswa kuva matavi maviri: nhengo yeverous (arantzium), iyo inopa ropa rinokonzera zvakananga kune yakaderera vena cava, iyo yakasanganiswa; pabazi rechipiri - ropa raamai rinopinda nepakati pemasipirini emasipirini zvakananga muropa re fetus, uko rinoshandiswa chezvinhu zvinosvibisa.

Somugumisiro, nehutachiona hwekupararira kweropa we fetus, yakakanganiswa neropa kubva kune inferior vena cava inopinda paanoramu yakanaka yechecheche, uye iyo inosuruvara inobva mumvura yepamusoro. Kubva pakunakira kusvika kune chairo chinonzi ventricle inogamuchira chikamu chiduku cheropa, chinosvika kumucheto mutsva wekupararira kuburikidza nemutumbi wepermonary. Ndiye iye anopa mapapu emapapu, tk. mapapu ari mudumbu raamai haashandi.

Ndeapi maumbirwo aripo mu fetal circulatory system?

Takaongorora urongwa hwekupararira kweropa rwema fetus, zvakakosha kutaura nezvekuvapo kwazviri mune mamwe maitiro akashanda, ayo akaberekerwa mwana asingasipo.

Saka mune se septum, iri pakati peatria, kune bhoti - hwindo revhavha. Kupfurikidza naye, kusanganiswa kweropa, kudarika denderedzwa duku, rinowira kamwe kuruboshwe rwetrium, kubva kwaro runopinda kumucheto wechipiri. Ipapo ropa rinopinda kune aorta, kupinda mudenderedzwa guru. Nokudaro kune mharidzo yemakwikwi maviri emudhiri we fetal.

Uyewo muhutachiona hwemucheche, kushandiswa kwebasa kunoratidzika, zvakadai sehondo dze duct. Anobatanidza trunk yepermon to the arch of the aorta, uye anowedzera kune imwe chikamu cheropa rakavhenganiswa. Mune mamwe mazwi, battalion yemharayi, pamwe newindo revharo, rinodurura denderedzwa remazipa shoma, rinotungamirira ropa zvakananga kune denderedzwa guru.

Izvozvo zvinotenderera sei mushure mekuberekwa?

Kubvira panguva yekufema kwekutanga kwemwana, kubva pakuberekwa kwake, denderedzwa rakatenderera ropa rinotanga kushanda. Mushure mokuberekwa kwechecheche yakasungirirwa nechemberi, chirongwa chekupararira kweropa che fetus uye amai chinorega kuvapo. Muchiitiko ichi, kuparadzirwa kweparcental kunomiswa zvachose uye umbilical vein haina chinhu. Izvi zvinotungamirira kukuderera kwakapinza mukumanikidzwa mukati mechidziro chekodzero yepamusoro uye kuwedzera kune rimwe divi rinonzi, pane. iripo iyo ropa inotumirwa kubva mudenderedzwa duku. Somugumisiro, nekuda kwekukanganiswa uku, mhepo yevheji yevhavha inozvibaya. Kana izvi zvisingaitiki, ipapo mwana anoonekwa kuti ane chirwere chisina kunaka, nokuti kune musanganiswa wemavhuna uye ropa reropa, semugumisiro wekuti maviri uye nhengo dzinowana ropa rakavhenganiswa.

Kana ari maBatalov uye Arancian ducts, akange aripo mukati mekupararira kwe-intrauterine ye fetus, ivo pakarepo, pakupedzisira pamwedzi wekutanga weupenyu, makumbo. Somugumisiro, mwana, saiye munhu mukuru, anotanga kushanda maitiro maviri ekuparadzirwa. Zvisinei, pasinei neizvi, mucheche achiri kuine zvimwe zvikamu zvehutachiona hwehupenyu, hunobatanidza nekushanda kwezvikamu zvega uye zvirongwa. Nokudaro, mwoyo yemakumbo emakumbo, imwe yekutanga yekuberekwa, inongororwa ne ultrasound.