primitive streak वाक्य
उदाहरण वाक्य
मोबाइल
- It is expressed in the anterior cells of Koller's sickle, which form the anterior cells of the primitive streak, a key structure through which gastrulation occurs.
- In mammals, the primitive streak and other surrounding tissues produce the morphogenic compounds Wnts, Nodal and retinoic acid to establish the posterior region during late gastrula.
- During the early stages of development, the primitive streak is the structure that will establish bilateral symmetry, determine the site of gastrulation and initiate germ layer formation.
- Underlying the epiblast is the hypoblast, where the extra-embryonic tissue originates . suggesting that its presence is important for regulating the formation of a single primitive streak.
- The primitive pit in Hensen s node, at the anterior end of the primitive streak, allows cells to enter which will form the notochord and prechordal plate.
- The expression of Evx1 is developmentally regulated, displaying a biphasic expression pattern with peak expression in the primitive streak during gastrulation and in interneurons during neural development.
- In higher chordates, the mesenchyme originates out of the primitive streak migrates anteriorly to form the somites and participate with neural crest mesenchyme in formation of the heart mesoderm.
- The ingressing PMCs must first alter their affinity for the neighboring epithelial cells that will remain in the vegetal plate ( vertebrate PMCs ingress from the primitive streak ).
- In the epiblast, it is induced by the primitive streak through Wnt signaling, and produces endoderm and mesoderm from a transitory tissue called mesendoderm during the process of gastrulation
- I was wondering if any research has been done into what would happen if someone was injected with an early stage human embryo before the primitive streak stage of development.
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