How does oxyntic cells produce HCl???????????????????????

Parietal cells (also known as oxyntic or delomorphous cells) are the epithelial cells that secrete hydrochloric acid (HCl) and intrinsic factor. These cells are located in the gastric glands found in the lining of the fundus and in the cardia of the stomach.They contain an extensive secretory network (called canaliculi) from which the HCl is secreted by active transport into the stomach.