"Indawo yengane", evela esibelethweni ngesikhathi sokubeletha, ibizwa ngokuthi i-placenta futhi ingenye yezitho zomuntu eziyingqayizivele kakhulu neziyinkimbinkimbi. Imisebenzi ye-placenta ngokugcwele ayikwazi ukushintshwa nanoma imiphi imishini yezokwelapha esezingeni eliphezulu noma amalungiselelo.
Iyini i-placenta?
Lo mzimba udalwa ngokwemvelo ukuqinisekisa zonke izici zokuthuthukiswa okuphelele kwengane ngaphakathi kwesibeletho nokuvimbela ukukhululeka ngaphambi kwesikhathi emithwalweni. Ukubaluleka okubalulekile kwe- placenta ekukhulelweni ukuthi akubandakanyi ukufinyelela izithelo zezinto eziyingozi ezifana ne-nicotine, utshwala, izidakamizwa njalonjalo. Nokho, lokhu akuwona wonke umsebenzi oyisisekelo we-placenta. Uma ubonisa isithakazelo esijulile emisebenzini yayo kanye nencazelo yemfundo, ungafunda izinto eziningi ezithakazelisayo.
Iyini imisebenzi ye-placenta?
Esigabeni samanje sokuthuthukiswa kwemithi, izici ezisebenzayo zendawo "yengane" njenge:
- ukushintshaniswa kwe-oxygen ne-carbon dioxide phakathi kwemithambo yegazi yesisu kanye nokukhulelwa ;
- ukuhlinzeka izakhi kumntanami, okunikezwa ngegazi lomama, kwenziwa. Izinsalela ezingavunyelwe zibuyela kumfazi;
- isitho socansi sikwazi ukuvikela umntwana kusuka kuma-virus, antibodies, amakhemikhali nama-bacterium angena emzimbeni womama. Lokhu kubonakaliswa komsebenzi womzimba;
- umsebenzi we-endocrine we-placenta uqukethe ukuhlukaniswa kwezidakamizwa ezithile, okwenza njengengqungquthela yokuvimba kwangaphakathi;
- umsebenzi we-hormonal we-placenta ubonakala ngokufihla kwama-hormone okudingekayo ukuze kulungiswe ngokushesha umzimba womama okhulelwe endaweni entsha nokuvikela ingane. Amakhomoni we-placenta amelwa yi-estrone, i-progesterone, i-hCG njalonjalo.
Ukwazi ukuthi i-placenta yimuphi umsebenzi, kusiza umama ozayo ukuba aqonde ngokubaluleka kokubaluleka kwakhe futhi abonise ukunakekelwa okukhulu kunakho konke impilo yakhe.