Primitive streak - Wikipedia
The primitive streak is an important concept in bioethics, where some experts have argued that experimentation with human embryos is permissible, but only before the primitive streak develops, generally around the fourteenth day of existence.
上胚层 - 百度百科
原条的前端有一个加厚的细胞区域，称为原结或亨氏结（primitive knot or Hensen' node）。 在原肠作用中，原结作为组织者，诱导迁移的上胚层 细胞分化 ，以此来决定上胚层细胞的命运。
原条 - 百度百科
原条（primitive streak）是发育生物学的概念，最先在鸟类胚胎发育中发现，从后端缘区向前伸展的条带，是由上胚层细胞向囊胚腔下陷造成的，功能上相当于两栖类的胚孔。
原線 - 维基百科，自由的百科全书
原線 （primitive streak 、又可稱為 原條 、原痕），是許多動物早期 胚胎 具有的構造，存在於 鳥類 、 哺乳類 、 爬蟲類 胚胎發育 的過程中。 原線在許多重要的胚胎發育時期扮演中線的角色，包括胚胎的 兩側對稱 、胚胎 原腸 形成的位置以及各胚層分布方式等。 往後的細胞重排 (包含原腸形成、三胚層形成)也根據這條中線進行 [1]。 原腸形成是第一個破壞胚胎對稱的發展階段，也使得胚胎具有前後之別 [2][3]。 同時細胞移動也同時進行著，上下胚層逐漸到達三胚層的原始位置， …
The primitive streak and cellular principles of building an amniote ...
The primitive streak, a transient embryonic structure, marks bilateral symmetry in mammalian and avian embryos and helps confer anterior-posterior and dorsal-ventral spatial information to early differentiating cells during gastrulation. Its recapitulation in vitro may facilitate derivation of tissues and organs with in vivo–like complexity.
The enigmatic primitive streak: prevailing notions and challenges ...
The primitive streak establishes the antero-posterior body axis in all amniote species. It is thought to be the conduit through which mesoderm and endoderm progenitors ingress and migrate to their ultimate destinations. Despite its importance, the streak remains poorly defined and one of the most enigmatic structures of the animal kingdom.
Primitive Streak - an overview | ScienceDirect Topics
The primitive streak is a region of the epiblast that forms during gastrulation and serves as a pathway for precursor cells of the mesoderm and definitive endoderm to ingress through an epithelial to mesenchymal transition.
The primitive streak, a transient embryonic structure, marks bilateral symmetry in mammalian and avian embryos and helps confer anterior-posterior and dorsal-ventral spatial information to early differentiating cells during gastrulation.
Induction and patterning of the primitive streak, an organizing center ...
Jan 28, 2004 · The primitive streak is the organizing center for amniote gastrulation. It defines the future embryonic midline and serves as a conduit of cell migration for germ layer formation. The migration patterns of endodermal and mesodermal precursors through the streak have been studied in great detail.
Primitive Streak - an overview | ScienceDirect Topics
The primitive streak is a region of epithelial-mesenchymal transition (EMT) where epiblast cells ingress to generate a new population of mesenchymal cells that give rise to mesoderm and definitive endoderm (DE).
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