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The Endowment for Human Development
The Endowment for Human Development
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Multilingual Illustrated DVD [Tutorial]

The Biology of Prenatal Development




UKUFUNDA NGOKWENZEKAYO NGAPHAMBI KOKUZALA

.isiZulu [Zulu]


National Geographic Society This program is distributed in the U.S. and Canada by National Geographic and EHD. [learn more]

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Chapter 41   4 to 5 Months (16 to 20 Weeks): Stress Response, Vernix Caseosa, Circadian Rhythms

Kumaviki awu 16, izinqubo ezibandakanya ukushuthekwa kwenaliti esiswini sengane ziletha ukuxineka kwamahomoni okudedela i-noradrenaline, noma i-norepinephrine, egazini. Izingane ezizelwe nabadala bakhombisa isenzo esifanayo kwizenzo ezisakuhlasela.

Emgudwini wokuphefumula, imithambo emaphashini isicishe iphelele.

Into yokuvikela emhlophe, okuthiwa yi-vernix caseosa, manje isiyemboze ingane. I-vernix ivikela isikhumba kwimiphumela ehluphayo ye-amniotic fluid.

Kusukela kumaviki awu 19 ukunyakaza kwengane,ukuphefumula, nokushaya kwenhliziyo kuqala ukulandela imijikelezo yosuku okuthiwa ama-circadian rhythms.

Chapter 42   5 to 6 Months (20 to 24 Weeks): Responds to Sound; Hair and Skin; Age of Viability

Kumaviki awu 20 i-cochlea, okuyisitho sokulalela, isikhule ngokugcwele ngaphakathi kwesikhule ngokwenele indlebe yangaphakathi. Kusukela manje, ingane isizophendula uhla olukhulayo lwemisindo.

Izinwele ziqala ukumila esikhunjeni sezinwele.

Zonke izingqimba nezakhiwo kwesikhumba sekukhona, kubandakanya izimbobo zoboya nezindlala.

Kumaviki awu 21 kuyaku 22 emva kokukhulelwa, amaphaphu athola ikhono elithile lokuphefumula. Lokhu kuthathwa njengokuzimela ngoba ukuphila ngaphandle kwesibeletho sekunokwenzeka kwezinye izingane. Uchunge olude lobuchwepheshe bodokotela lwenza kukwazeke ukusimamisa izimpilo zezingane ezizalwe ngaphambi kwesikhathi.