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Summary
| Description |
This image shows the different germ layers. The top panel shows the epiblast and trophoblast cells in the early stages of development. The bottom panel shows the three germ layers: the endoderm, ectoderm, and mesoderm. All the other major parts are also labeled. Figure 28.9 Germ Layers Formation of the three primary germ layers occurs during the first 2 weeks of development. The embryo at this stage is only a few millimeters in length. Illustration from Anatomy & Physiology, Connexions Web site. Embryonic Development https://openstax.org/books/anatomy-and-physiology/pages/28-2-embryonic-development, Jun 19, 2013. |
| Source | Anatomy & Physiology, Connexions Web site. Embryonic Development https://openstax.org/books/anatomy-and-physiology/pages/28-2-embryonic-development, Jun 19, 2013. |
| Author | OpenStax College |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 10:28, 14 December 2013 | | 1,781 × 1,590 (1.06 MB) | CFCF |
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