To explain: The formation of neural tube and neural crest cells.
Concept introduction: Neural tube is an embryonic structure which is found in the vertebrate embryo. These neural tubes can ultimately form the brain and spinal cord. The neural tube is formed by a process called neurulation.
Neural crest cells are a group of cells which are originated at the dorsal most region of the neural tube. The neural crest cells can migrate to give rise to a number of differentiated cell types. These include the neurons, bone, pigment cells, facial skeleton, cartilage, glia, peripheral nervous system and facial skeleton.
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