Embryology: The events of the 3rd week of Development
Автор: khadijat Bobbo
Загружено: 2025-11-19
Просмотров: 73
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Welcome to our deep dive into embryology’s most transformative stage — the 3rd week of development! 🌱 Often called the “week of gastrulation”, this period marks the true beginning of embryonic life.
During this week, the embryo undergoes a dramatic shift:
The bilaminar embryonic disc transforms into a trilaminar structure.
Three germ layers, ectoderm, mesoderm, and endoderm, are established.
These layers serve as the blueprint for every tissue and organ in the human body.
Body axes are defined, ensuring proper orientation and organ placement.
This turning point is crucial: without the correct formation of germ layers and body axes, normal organogenesis cannot occur. In other words, this is the moment when a simple cluster of cells begins to organize into a structured embryo with a clear developmental pathway.
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