<prompt> All are Neural crest derivatives EXCEPTOdontoblastsSympathetic gangliaIris musclesC cells of thyroid gland  <response>: - Neural crest cells themselves are coming from epiblasts which contribute to numerous structures in body like peripheral nervous system etc. Derivatives of Neural Crest Cells: - Sensory neurons of cranial ganglia - V, VII, VIII, IX, X - Sensory neurons of spinal dorsal root ganglia their peripheral sensory receptors - Satellite cells in all sensory ganglia - Sympathetic ganglia plexuses - Neurons satellite cells - Parasympathetic ganglia plexuses - Neurons satellite cells - Enteric plexuses - Neurons glial cells - Schwann cells of all peripheral nerves - Medulla of suprarenal gland, chromaffin cells - Carotid body type I cells and type II, satellite type cells - Calcitonin-producing cells c-cells - Melanocytes - Mesenchymal derivatives in the head - Frontal, parietal, squamous temporal, nasal, vomer, palatine bones, maxillae mandible - meninges - Choroid, sclera, iris ciliary body controversial Iris muscles- Sphinctor dilator pupillae - from neural plate ectoderm - Connective tissue of lacrimal, nasal, labial, palatine, oral salivary glands. - Dentine of teeth odontoblasts - Connective tissues of head, including cailage, ligaments tendons - Connective tissues of thyroid gland of pharyngeal pouches i.e, parathyroid glands thymus - Tunica media of outflow tract of hea the great vessels. 