Iimpawu zokuphefumula komntwana
Umntwana uhlala esenza ukunyakaza okuphefumulayo. Ngelo xesha, i-vocal cleft ivaliwe ngokuvaliweyo, oko kuvimbela i-amniotic fluid ukungena emaphaphu. Iimpawu zepulmonary asikaze zikhule, kwaye ayikho into ekhethekileyo ebizwa ngokuba yi-surfactant. Yenziwa kuphela ngeveki 34, i. Kungekudala ngaphambi kokuzalwa komntwana. Le ncedisi inceda ukuqinisekisa ukuphazamiseka komhlaba, okuphumela ekuvuleni kwe-alveoli. Emva koko, imiphunga iqala ukusebenza, njengomntu omdala.
Kuloo matyala xa le nto ingavelwanga, okanye umntwana ubonakala ngaphambi komhla ofunekayo , umntwana unxulumene nesixhobo sokungena umoya emiphakeni. umzimba ngokwawo awunako ukwenza umsebenzi wayo wokutshintshwa kwegesi.
Ukutshintshiselana kwegesi kumntwana?
Kwaye kwiiveki zokuqala zokukhulelwa, ii-placenta zifomeni eludongeni lwe-uterine.
Kungenxa ye-placenta ukuba i-oksijini ephuma kwigazi lomama ingena kumntwana. I-carbon dioxide eyenziwe ngenxa yokutshintshwa kwegesi, idlula indlela yokubuya, ibuyele kwigazi lomama.
Ngaloo ndlela, indlela umntwana ephefumula ngayo kwisibeleko sikamama kuxhomekeke ngokupheleleyo kwimeko yepentecenta. Ngoko ke, ngokuphuhliswa kweempawu zobunzima be-oksijini kumntwana, okokuqala, eli lilungu liphantsi koviwo, liqhuba i-ultrasound yayo.