<prompt> Intrinsic factor of Castle is secreted byChief billsParietal cellsMucous cellsss cells  <response>: Characteristics of the Gastric Secretions a. In addition to mucus-secreting cells that line the entire surface of the stomach, the stomach mucosa has two impoant types of tubular glands: oxyntic glands also called gastric glands and pyloric glands. b. The oxyntic or Parietal acid-forming glands secrete hydrochloric acid, pepsinogen, intrinsic factor. Ref: guyton and hall textbook of medical physiology 12 edition page number: 406,407,408 