Zygomogenic cells: Also known as peptic cells or chief gastric cells, these are present gastric mucosa of gastric glands and secretes pepsinogen and gastric lipase.
Parietal cells: Also known as oxyntic cells, these screte hydrochloric acid and intrinsic factor that is needed for absorbtion of vitamin B12.
Acinar cells: These are present in the pancreas and produces digestive enzymes. They aggregate and form bundles which resemble the cluster of grapes.