They secrete intrinsic factor. None of the above answers. Decidual cells are formed from the trophoblast. Ciliary muscle contraction permits the eye to focus on close objects. Zonule fibers connect the ciliary epithelium to the lens capsule.
Aqueous humor is produced by the ciliary epithelium.
The ciliary epithelium continues anteriorly, covering the anterior surface of the iris. The release of hormones from this area involves a portal system. No neuronal cell bodies are present. It releases a factor that stimulates release of thyroid hormone from the thyroid gland. It is derived from neural ectoderm.