Âmnio e Camadas Germinativas

Roteiro: Mukupera kwesvondo, ma"cell" emukati-kati me"cell mass" anoita zviviri zvakafukidza zvinonzi "hypoblast" ne " epiblast".

Iyi "hypoblast" inokonzera kukura kwechakavhara zai, chinova chinokonzera kufamba kwezvinokudza mwana paanenge achiri pazera re"embryo".

Ma "cell" anowanikwapa "epiblast" anoita mambure anonzi "amnion", anova ndiwo anochengeta 'embryo' ichapinduka kuita "fetus" kusvikira mwana aberekwa.

Pakupera kwemasvondo maviri anechidimbu, "epiblast" inenge yavepo uye ne ma"specialized tissues" matatu, kana kuti ma "germ layers", anonzi "ectoderm", "endoderm", ne" mesoderm".

"Ectoderm" inokonzera kukura kwenhengo dzemuviri dzinosanganisa uropi, musana, tsinga, ganda, nzara, nevhudzi.

"Endoderm" inogadzira mukati mehuro nezvekufema zvese uye nezvekumedza nekudya zvese, uye nekugadzira dzimwe nhengo dzese dzemuviri dzakaita sechitaka nerwatata.

"Mesoderm" inogadzira mwoyo, neitsvo, mapfupa, tsinga dzinobatanidza mapfupa, nyama yemuviri, tsinga dzeropa, nedzimwewo nhengo.