The primitive streak and cellular principles of building an amniote ...
2021年12月3日 · The primitive streak, a transient embryonic structure, marks bilateral symmetry in mammalian and avian embryos and helps confer anterior-posterior and dorsal-ventral …
3rd week of embryonic development: Steps and processes - Kenhub
2023年8月10日 · Primitive streak cells continue to migrate and differentiate into mesoderm up until the beginning of the 4th gestational week. As mesoderm production declines, the primitive …
Primitive streak | embryology | Britannica
…elongated depression known as the primitive streak. As the embryo develops, the cell layers fold over so that the endoderm forms a long tube surrounded by mesoderm, with an …
Embryology, Gastrulation - StatPearls - NCBI Bookshelf
2023年4月23日 · Primitive Streak. The initiation of the primitive streak is based upon a system of signaling pathways working to both positively and negatively regulate downstream expression. …
The enigmatic primitive streak: prevailing notions and challenges ...
For more than a century, developmental biologists have been fascinated by the mechanisms through which the amniote body plan is deployed. The primitive streak, a key structure in this …
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 …
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 …
Primitive Streak - Development and Stem Cells - LifeMap Sciences
The primitive streak is a transient structure whose formation, on day 15 of human development, marks the start of gastrulation, the process in which the inner cell mass in converted into the …
The amniote primitive streak is defined by epithelial cell ... - Nature
2007年10月10日 · We propose that the amniote primitive streak evolved from the ancestral blastopore by acquisition of an additional medio-lateral intercalation event, preceding …
Induction and patterning of the primitive streak, an organizing center ...
2004年1月28日 · 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. …
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