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Related Concept Videos

Gastrulation01:56

Gastrulation

Gastrulation establishes the three primary tissues of an embryo: the ectoderm, mesoderm, and endoderm. This developmental process relies on a series of intricate cellular movements, which in humans transforms a flat, “bilaminar disc” composed of two cell sheets into a three-tiered structure. In the resulting embryo, the endoderm serves as the bottom layer, and stacked directly above it is the intermediate mesoderm, and then the uppermost ectoderm. Respectively, these tissue strata will form...
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Intramembranous ossification is one of the two processes involved in the development of bones within an embryo. The flat bones of the face, most of the cranial bones, and the clavicles are formed via this process. During intramembranous ossification, the bones develop directly from sheets of undifferentiated mesenchymal connective tissue.
The process begins when mesenchymal cells in the embryonic skeleton gather together and differentiate into osteogenic cells, which then develop into...

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Related Experiment Video

Updated: May 10, 2026

Analyzing Craniofacial Morphogenesis in Zebrafish Using 4D Confocal Microscopy
09:16

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Published on: January 30, 2014

A cross-tissue physicochemical causal chain underlying vertebrate mandibular morphogenesis.

Kazutaka Hosoda1, Daisuke Ohtsuka1, Sang-Woo Lee1

  • 1Laboratory for Developmental Morphogeometry, RIKEN Center for Biosystems Dynamics Research, Kobe 650-0047, Japan.

Science Advances
|May 8, 2026
PubMed
Summary

Zebrafish oral ectoderm folding, driven by Shh signaling, guides jaw development by controlling mesenchymal cell movement. This study reveals cross-tissue physical coordination in embryonic morphogenesis.

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Area of Science:

  • Developmental biology
  • Biophysics
  • Cell biology

Background:

  • Morphogenesis relies on physical forces, especially in complex embryonic structures with adjacent tissues.
  • Cross-tissue physical coordination is crucial but understudied in embryonic development.

Purpose of the Study:

  • To investigate the role of physical interactions between tissues in embryonic jaw development.
  • To explore how oral ectoderm dynamics influence mandibular morphogenesis in zebrafish.

Main Methods:

  • Utilized zebrafish jaw development as a model system.
  • Observed dynamic folding of oral ectoderm and its effect on mesenchymal cell motion.
  • Investigated the role of Shh signaling in initiating ectodermal cell polarization.

Main Results:

  • Dynamic folding of oral ectoderm was shown to drive mandibular primordia elongation and fusion.
  • Shh signaling from the neural tube initiated polarized behaviors in oral ectodermal cells.
  • Mandibular formation occurred independently of cell proliferation, relying on polarized cell motion in both epithelium and mesenchyme.

Conclusions:

  • Identified a physicochemical causal chain in embryonic tissue shaping.
  • Demonstrated cross-tissue physical coordination where ectoderm folding constrains and guides mesenchyme.
  • Provided a holistic view of complex embryonic tissue shaping through physical interactions.