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| 91. | meninges | protective outer coverings of the CNS composed of connective tissue |
| 92. | mesencephalon | primary vesicle of the embryonic brain that does not significantly change through the rest of embryonic development and becomes the midbrain |
| 93. | metencephalon | secondary vesicle of the embryonic brain that develops into the pons and the cerebellum |
| 94. | midbrain | middle region of the adult brain that develops from the mesencephalon |
| 95. | myelencephalon | secondary vesicle of the embryonic brain that develops into the medulla |
| 96. | nerve plexus | network of nerves without neuronal cell bodies included |
| 97. | neural crest | tissue that detaches from the edges of the neural groove and migrates through the embryo to develop into peripheral structures of both nervous and non-nervous tissues |
| 98. | neural fold | elevated edge of the neural groove |
| 99. | neural groove | region of the neural plate that folds into the dorsal surface of the embryo and closes off to become the neural tube |
| 100. | neural plate | thickened layer of neuroepithelium that runs longitudinally along the dorsal surface of an embryo and gives rise to nervous system tissue |
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