[ToC]

 

A. Franklin Shull, Principles of Animal Biology, McGraw-Hill, 1924

TYPES OF SECRETING SURFACES AND GLANDS

A, scattered gland cells (two goblet cells containing secretion in the darkly stippled goblets); B, gland cell enlarged and dropped below general level; C, group of secreting cells dropped slightly below the general level; D, a simple multicellular gland; E, alveolar gland with neck; F, tubular gland; G, compound alveolar gland; H, compound tubular gland; l, lumen; m, mouth; n, neck; v, acini. Secreting portions of the glands are stippled.