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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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The 8-Week Embryo

Chapter 30   8 Weeks: Brain Development

Kumaviki angu 8 ubuchopho sebukhule kakhulu futhi bucishe bube yineye wesisindo somzimba wombungu.

Ukukhula kuqhubeka ngesivinini esingajwayelekile.

Chapter 31   Right- and Left-Handedness

Kumaviki awu 8, u 75% wemibungu ukhombisa ukukhonya kwesandla sokudla. Esele ihlukaniseke ngokulinganayo phakathi kwamanxele nonxazonke. Lobu wubufakazi bokuqala bokujwayela esokudla noma sobunxele.

Chapter 32   Rolling Over

Amabhuku ngezingane achaza ukuthi ikhono "lokuphenduka" livela kumaviki awu 10 kuyaku 20 emva kokuzalwa. Nokho, le likhono elihlaba umxhwele liyashesha ukuvezwa esimweni esingenangcindezi se-amniotic sac egcwele uketshezi. Kuphela wukuntuleka kwamandla adingekayo ukunqoba amandla angaphezulu engcindezi ngaphandle kwesibeletho kunqanda ingane ezelwe ekuphendukeni.

Umbungu uya ngokuba matasa ngale sikhathi.

Iminyakazo inganensa noma isheshe, kanye noma iphindaphinde, izenzekele noma iphendule okunye.

Ukujikisa ikhanda, ukwelula umqala, nesandla esithinta ubuso kuya ngokwanda.

Ukuthinta umbungu kudala ukuyaluzisa amehlo, ukunyakaza komhlathi, iminyakazo yokubamba, nokukhomba kwezinzwane.

Chapter 33   Eyelid Fusion

Phakathi kwamaviki 7 no 8, amajwabu amehlo akhula ngokushesha ngaphezu kwamehlo futhi aya ngokuhlangana.

Chapter 34   "Breathing" Motion and Urination

Yize noma awukho umoya esibelethweni, umbungu uveza iminyakazo yokuphefumula kumaviki awu 8.

Ngale sikhathi, izinso zikhiqiza umchamo ochithwa kwi- amniotic fluid.

Kwimibungu yesilisa, amasende akhulayo aqala ukukhiqiza nokukhipha i-testosterone.

Chapter 35   The Limbs and Skin

Amathambo, amalunga, imisipha, imizwa, nemithambo yegazi yezingalo nemilenze kucishe kufane nokwabadala.

Kumaviki awu 8 isikhumba sangaphandle, siba nezingqimba eziningi, silahlekelwe wukubonakala ngale.

Kumila amashiya ngenkathi kuvela uboya ngaphandle komlomo.

Chapter 36   Summary of the First 8 Weeks

Amaviki awu 8 asho ukuphela kwesikhathi sombungu.

Ngale sikhathi, umbungu womuntu usukhule usuka kwiseli eyodwa waba cishe ngu 1 billion amaseli akha ngaphezu kuka 4,000 izakhiwo ezicacile zomzimba.

Umbungu manje usunezingaphezu kuka 90% izakhiwo ezitholakala kwabadala.