<prompt> All of the following are mesodermal in origin except:Dilators of irisIris stromaCiliary bodyChoroid  <response>: A i.e. Dilator of iris Nervous system including all neurons, neuroglia Schwann cells are of ectodermalQ origin except microglia which is mesodermal QAll muscles smooth, striated cardiac are mesodermal except the musculature of the iris sphincter dilator pupillae which are ectodermal QKidney, ureter, bladder trigone, posterior wall of female urethra, posterior wall of prostatic male urethra inner glandular zone of prostate are of mesodermal origin.Endodermal origin epithelium is seen in urinary bladder except trigone mesodermal; Female urethra except pa of its posterior wall mesodermal; male urethra except pa of the posterior wall of its prostatic pa mesodermal except the penile urethra lying in glans penis ectoderm and greater pa of prostate except inner glandular zone mesodermal 