system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Which of the following is not a neural crest derivative?
assistant
The correct answer is  Sphincter pupillae is derived from neurectoderm not mesenchyme or neural crest cell Neural Crest Derivatives: *Corneal Keratocytes *Ciliary muscles *Corneal stroma and endothelium (endothelial cells and keratocytes) *Pericytes of choroidal membranes *Melanocytes *Ciliary ganglion *Stroma of Iris and choroid Trabecular meshwork extraocular muscles are mesodermal in origin