Posterior part : Pyloric gastric glands in rabbit and human-cells are mucous neck cells secreting mucous and some cells, called gastrin or G cells, secrete a hormone, named gastrin, which increases the motility of gastric wall and stimulates gastric glands for active secretion.(3) Functions (i) Storage of food.(ii) Trituration or churning of food to mix with gastric juice.(iii) Functions of gastric juice (discussed along with gastric juice).