Mukati
Munguva yose yekuzvitakura, placenta inoshanda semhepo inovhara. Imhando yepuratifomu yekutsinhana pakati paamai nemwana. Apa ndipo apo, nekuda kwetambo yayo, "fetus" inokwevera chikafu neokisijeni inotakurwa neropa raamai.
Iyo placenta inosimbisa chibereko
Basa rekutanga re placenta, nhengo ye ephemeral ine masimba anoshamisa, kudya. Kukochekerwa kuchibereko uye kubatanidzwa nebeche netambo kuburikidza netsinga uye tsinga mbiri, rudzi urwu rwesiponji hombe yakazara neropa uye villi (mambure etsinga netsinga) nzvimbo yekuchinjana kwese. Kubva pavhiki ye8, inopa mvura, shuga, amino acids, peptides, minerals, mavitamini, triglycerides, cholesterol. Perfectionist, inounganidza tsvina kubva muchibereko (urea, uric acid, creatinine) uye inoabudisa muropa raamai. Ndiye itsvo yemwana nemapapu ake, kupa oxygen uye kubudisa carbon dioxide.
Ko placenta inoratidzika sei?
Yakanyatsoumbwa mumwedzi wechishanu wepamuviri, iyo placenta idhisiki gobvu 5-15 masendimita dhayamita iyo ichakura nemwedzi kuti isvike nguva inorema 20-500 g.
The placenta: nhengo yakasanganiswa inotorwa naamai
Iyo placenta inotakura maDNA maviri, amai uye baba. Dziviriro yemuviri yaamai, iyo inowanzoramba izvo zvisiri izvo kwavari, inoshivirira iyi nhengo yakasanganiswa ... inovada kuti vagare zvakanaka. Nekuti iyo placenta inotora chikamu mukushivirira kweiyo transplant iyo iri chaizvo nhumbu, kubvira hafu yemaantigen ari muchibereko ndeababa. Kushivirira uku kunotsanangurwa na kuita kwemahomoni aamai, ayo anovhima mamwe masero machena eropa anogona kushandura immune system. Mumiriri akanaka kwazvo, placenta inoshanda sechivharo pakati pesimba rekudzivirira remuviri raamai neremwana. Uye anowana feat: ita kuti ropa ravo rirege kusanganiswa. Kutsinhana kunoitika kuburikidza nemadziro emidziyo uye villi.
Iyo placenta inoburitsa mahormone
The placenta inogadzira mahormone. Kubva pakutanga, kuburikidza ne trophoblast, rondedzero ye placenta, inoburitsa yakakurumbira beta-hCG : iyi inoshandiswa kugadzirisa muviri waamai uye inotsigira kushanduka kwakanaka kwepamuviri. Zvakare progesterone iyo inochengetedza mimba uye inozorodza uterine muscle, estrogens iyo inotora chikamu mukukura kwakakodzera kwe fetal-placental; placental GH (kukura kwehomoni), placental lactogenic hormone (HPL) ...
Mishonga inopfuura kana isingapfuure placental barriers…
Mamorekuru akadai heparin usapfuure placenta. Saka mukadzi ane pamuviri anogona kuiswa paheparin kune phlebitis. Ibuprofen michinjikwa uye inofanira kudziviswa: inotorwa panguva ye1 trimester, zvingava zvinokuvadza kune ramangwana kuumbwa kwegadziriro yekubereka yemukomana we fetus, uye inotorwa mushure memwedzi wechitanhatu, inogona kusanganisira njodzi yemwoyo kana renal kukundikana. Paracetamol inoregererwa, asi zviri nani kudzikamisa kutora kwayo kusvika kunguva pfupi.
Iyo placenta inodzivirira kune zvimwe zvirwere
Iyo placenta inotamba basa rinodzivisa kudzivirira kupfuura kwehutachiona uye hutachiona hwehutachiona kubva kuna amai kuenda kumwana wavo, asi hazvifambiki. Rubella, chickenpox, cytomegalovirus, herpes inokwanisa kupinda mukati. Furuwenza zvakare, asi pasina migumisiro yakawandisa. Nepo zvimwe zvirwere zvakaita setibhii zvisingambo pfuure. Uye vamwe vanoyambuka zviri nyore pakupera kwemimba kupfuura pakutanga. Ndapota cherechedza kuti placenta inobvumira doro uye zvikamu zvefodya kupfuura !
PaD-Day, placenta inoridza yambiro kuti itange kuzvara mwana
Mushure memwedzi ye9, yave nezuva rayo, uye haichakwanisi kupa hukuru hwesimba hunodiwa. Yasvika nguva yokuti mwana afemere uye adye ari mudumbu ramai vake. uye pasina rubatsiro rweplacenta yake isingaparadzanisiki. Izvi zvinobva zvaita basa razvo rekupedzisira, kutumira mameseji ekuzivisa izvo zvinotora chikamu mukutangwa kwekuzvarwa. Akatendeka kune post, kusvika kumagumo.
Iyo placenta pamwoyo wemitambo yakawanda
Anenge maminitsi makumi matatu mushure mokuberekwa, placenta inobudiswa. MuFrance, inopiswa se "marara ekushanda". Kumwe kunhu, kunonakidza. Nokuti anonzi mapatya emwana ari mudumbu. Kuti ane simba rekupa hupenyu (nekudyisa) kana rufu (nekukonzera kubuda ropa).
Kumaodzanyemba kweItaly, inoonekwa sechigaro chemweya. MuMali, Nigeria, Ghana, mwana wacho anopeta kaviri. VaMaori veNew Zealand vakamuviga muhari kuti vasungirire mweya wemwana kumadzitateguru. VanaObando vekuPhilippines vanomuviga nematurusi madiki kuitira kuti mwana ave mushandi akanaka. MuUnited States, vamwe vakadzi vanosvika pakuda kuti placenta yavo ipererwe mvura kuti imedze mumakapisi, anofanirwa kuvandudza kuyamwisa, kusimbisa chibereko kana kudzikamisa kushushikana kwepashure pekusununguka (kuita uku hakuna hwaro hwesainzi).