Forms of Glands
Forms of glands. Labels: A, a simple secreting surface; a, its epithelium; b, basement membrane; c, capillaries; B, a simple tubular gland; C, a secreting surface increased by protrusions; E, a simple racemose gland; D and G, compound tubular glands; F, a compound racemose gland. In all but A, B, and C the capillaries are omitted for the sake of clearness. H, half of a highly developed racemose gland; c, its main duct.