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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




IBINYABUZIMA BIJYANA NO GUTWITA

.Kinyarwanda


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

Mubyumweru 8 ubwonko buba bwarakuze rwose buba bungana na kimwe cya kabiri cy'ibiro byose by'uruhinja.

Gukura gukomeza kwihuta kuburyo budasanzwe.

Chapter 31   Right- and Left-Handedness

Mugihe cy'ibyumweru 8, 75% by'impinja ahanini zerekana iburyo bwazo. Igihimba gisigaye kigabanyamo imigabane ingana hagati y'ibumoso n'ahandi. Ibimenyesho byogukoresha Indyo cyangwa imoso.

Chapter 32   Rolling Over

Abaganga bavura abana nibo babifitemo "ubuzobere" nkuko bigaragara mubyumweru 10 kugeza ku 20 nyuma yo kuvuka. Ariko nanone, urwo ruhererekane ruhambaye rwerekana bigikubita aho uburemere buke buri bwa ya mavuta arinda igi gukomereka. Keretse gusa habuze imbaraga zikenewe kugira ngo haneshwe ibogama ry'ingufu ziturutse kuruhande ubundi ikiziba cy'inda kirinda umwana impanuka.

Uruhinja rutangira gukubagana muri iki gihe.

Ashobora gukubagana buhoro cyangwa cyane, rimwe cyangwa kenshi, kubushake cyangwa hari impamvu.

Umutwe kuwubona ahandi, ijosi ari uko, n'akaboko kakagaragara ibyo bikunze kubaho.

Gukora kugahinja bituma gakinisha imisaya, kakerekena gupfumbata cyane, no kwereka ino.

Chapter 33   Eyelid Fusion

Hagati y'ibyumweru 7 n'8, ibitsike by'amaso bikura bwangu hejuru y'amaso bikajya no kwegerana.

Chapter 34   "Breathing" Motion and Urination

Nubwo nta muyaga uba uri mu kiziba cy'inda, uruhinja rwerekana rimwe na rimwe uburyo bwo guhumeka mubyumweru 8.

Muri iki gihe, impyiko zisohora inkari zikajya mu wa mufuka w'amavuta.

Mw'isoro rizavukamo igitsina gabo, haboneka ibimenyetso byuko hazavuka umuhungu.

Chapter 35   The Limbs and Skin

Amagufwa, ingingo, inyama, ibitekerezo, n'imitsi y'amaraso by'umubiri bijya gusa n'iby'abantu bakuru.

Mubyumweru 8 uruhu rwo hanze, cyangwa uruhu rusanzwe, rufata imbera byombi, rutakaza ububonerane bwarwo.

Ingohe zikura nk'umusatsi ugaragara iruhande rw'umunwa.

Chapter 36   Summary of the First 8 Weeks

Ibyumweru 8 bigaragaza kurangira igihe cy'isoro.

Muri iki gihe, isoro ry'umuntu riba ryararumbutse kuva kukaburungu kamwe kugeza hafi k'utuburungu miriyardi 1 aribyo bigira ibihimba birenze 4,000 by'umuntu.

Ubwo rero isoro riba rifite ibirenze 90% by'ibihimba biboneka mu bantu bakuru.


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