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The Biology of Prenatal Development




IBHAYOLOGI LEPHATSELENE NEKUKHULA KWEMNTFWANA LOSESESIBELETFWENI SENINA

.Siswati [Swati (siSwati)]


 

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Capítulo 40   3 a 4 Meses (12 a 16 Semanas): Papilas Gustativas, Movimento de Mandíbula, Reflexo de Sucção, Percepção dos Primeiros Movimentos do Feto

Emkhatsini wa 11 na 12 wemaviki, sisindvo sefithasi sikhula cishe 60%.

Emaviki lalishumi nakubili aluphawu lwekuphela kweyekucala incenye yinye kuletintsatfu, kumbe nyangantsatfu wekucala, wekutetfwala.

Tinambitsi letibonakalako Setivumbuke ngekhatsi emlonyeni.
Ngalesikhatsi umntfwana atalwa, tinambitsi titawusala kuphela elulwimini kanye naseluphahleni lwemlomo.

Kuhamba kwesisu kucalisa le emuva emavikini la-12 futsi kuchubeke sikhatsi lisitsi asibe ngemaviki la-6.

Loku kwekucala lokukhishelwa ngaphandle litfumbu lelikhulu lefithasi nemntfwana losandza kutalwa kubitwa ngekutsi yimekhoniyamu. Kwentiwe ngema-enzayimi lagaya kudla, emaphrothini, kanye netinhlayiya letifile lokulahlwe ngumgudvu logaya kudla.

Emavikini la-12, budze betitfo temtimba wangetulu cishe sebufike lapho kumele tikhule tigcine khona nakulinganiswa nebukhulu bemtimba sebuphelele. Ticu temtimba longentasi titsatsa Sikhatsi lesitsi asibe sidzana kufika ebukhulwini lapho kumele tikhule tigcine khona.

Ngaphandle kwemhlane kanye nelukhakhayi, umtimba wefithasi yonkhe nyalo uyanyakata nakukhona lokuyitsintsa kancane.

Umehluko ekwakhekeni kwemuntfu loya ngekutsi buyini bulili bemntfwana ucalisa kuvela. Sibonelo, emafithasi lamasikati akhombisa kunyakata kwemihlatsi kakhudlana kunalamadvuna.

Esikhundleni sekubuyela emuva njengobe sibone phambilini, nyalo nakukhona lokuyitsintsa ngasemlonyeni kubangela kutsi ijikele ngalapho itsintseka ngakhona iphindze ivule nemlomo. Lokunyakata loku kubitwa Ngekutsi the "kutfungatsa" futsi kuchubeka ngisho asatelwe umntfwana, kwelekelele umntfwana losandza kutalwa kutsi atfole ingono yenina ngalesikhatsi amunyiswa libele.

Buso buyachubeke buyakhula njengobe emafutsa langakadvonswa ngumtimba enta kutsi tihlatsi ticalise kugcwala futsi sekucalisa nekwakheka kwematinyo.

Emavikini la-15,tinhlayiyasicu letakha ingati tiyafika futsi tiyaphindzaphindzana emkantjeni. Lokunyenti kwakheka kwetinhlayiya tengati kutakwenteka lapha.

Ngisho naloku kunyakata kucalisa ku-embriyo lena-6 wemaviki, make lotetfwele ucalisa kuva kunyakata kwefithasi emkhatsini wa-14 na-18 wemaviki. Ngalokwetayelekile, lesehlakalo lesi sibitwa ngekutsi kukhahlela.