Chorion imwe yemakumbo epa placenta. Icho chikamu chemugadziri wechipfuva (inenge yakasara pakati) uye inotora basa guru mumetabolism ye fetus. Mumakore ekumavirira, mutsara wokuti "mharidzo yezvokudya" haisi chokwadi zvachose, nokuti inongova imwe yemakumbo emakona (midzi), saka mutsara unoti "chirongwa chekuisa" chinowanzoshandiswa. Nzvimbo yakasarudzwa ye chorion ihwo huriri hwechibereki kana kuti chikamu chepamusoro chemasvingo ekupedzisira. Asi dzimwe nguva chorion iri pamasvingo ekutanga emuviri kana muchikamu chezasi chechibereko. Muchikamu chino, tichakurukura zvinhu zvekudzivirira kwepamuviri apo chorion inowanikwa munzvimbo yakatarisana neusvingo.
Chorion nzvimbo yaungasarudza
Nzvimbo inowanzowanikwa munzvimbo yekodhi ndiyo mushure wekupedzisira wechibereki pamwe nekushandura kunzvimbo dzakasara, pamwe nekugadzirisa urongwa hwechirion, iyo yakanakisisa yekuita pamuviri. Localization yevhirious chorion parusvingo rwokunze inofungidzirwa sechimiro chechimiro. Kana chorion ichikwirira kumusoro pamadziro emukati, ipapo hapana chakavhiringidzika pamusana pepamuviri (anenge masendimita matatu kubva mukati memutsipa wemukirini).
Chorion inowanikwa pakutanga pakuumbwa kwembryo, inofanirwa kudyidzana nekamu fetus mushure mevhiki yegumi nembiri yekudzivirira. Kubvira vhiki yegumi nembiri, basa iri rinofungidzirwa neparcenta. Pakutanga, chorion ine maitiro emakona mashoma akapoteredza embryo, pashure pacho kuwedzera kwekuwedzera kunoshanduka kuva chorionic villi.
Mharidzo ye chorion
Iyo mharidzo ye chorion mushure kumashure kana rusvingo rwekunze runoisa dambudziko kumwedzi wekudzivirira. Ipai mharidzo yepamucheto (kumucheto kwepalacenta inopfigira mukati memukati wechibereki chibereko) uye mharidzo yakakwana (iyo placenta inobatanidza zvachose mukati memukati mutsara wechibereko). Vakadzi vane pamuviri vakadai vanoda kutarisirwa kwakasiyana, sezvo vari pangozi yekusagadzikana kwemaitiro. Kana mharidzo ye chorion inowanikwa pamadziro emukati, dambudziko rekubuda ropa rinenge riripamusoro, nokuti chikamu chezasi chemukati wepamuviri chechibereko chinowedzera zviri nani uye chinokurumidza uye dzimwe nguva chinowedzera kukura kwepascenta pane zvinokonzera kubuda ropa.
Takaongorora zviitiko zvekudzivirira kwepamuviri apo chorion iri panzvimbo yakatarisana nekamberi kworusvingo. Muchiitiko chacho apo chorion iri mune chetatu chepamusoro chechibereko chepamuviri hapana chinotyisidzirwa. Kana chorion ichibatanidzwa kumusango wepamuviri wechibereko, muchetere wepasi wechitatu, dambudziko rekuputika kwemazuva mashoma rinowedzera.