<prompt> Meissners and Auerbachs plexus are derived from:Neural crestYolk sacPrimordial germ cellEpithelial lining of gut  <response>: Neural crest Derivatives of Neural crest cellsSpinal gangliaGanglia of autonomic nervous systemGanglia of cranial nerves V, VII, VIII, IX, XSheaths of peripheral nervesMeningeal coverings of brain spinal cordPigment cells melanocytesAdrenal medullaOdontoblasts of toothChromaffin tissueCells arising from the cranial pa of the neural crest migrate into the mesenchyme of the head neck and influence development of somitomeres. They probably play an impoant role in development of the musculature of the head, and in formation of face.Defective migration of neural crest cells result in- albinism- tong. megacolon Hirschsprungs ds. - melanoma- elephant man- oropharyngeal teratoma- neurocristopathies 