The human stomach has several million of these pits which dot the surface of the lining epithelium.

Surface mucous cells line the pits themselves but give way to a series of other types of cells which then line the glands themselves.

Gastric juice contains hydrochloric acid, pepsinogen and mucus.

Hydrochloric acid is secreted by parietal cells, pepsinogen is secreted by gastric chief cells and mucus is secreted by mucous neck cells.

[3] This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)