Page 154 - Atlas of Histology with Functional Correlations

FIGURE 4.17 ■ Compound tubuloacinar (exocrine) gland: salivary gland. A.

Diagram of the gland. B. A submandibular salivary gland. Stain: hematoxylin
and eosin. Low magnification.

FIGURE 4.18 | Compound Tubuloacinar

(Exocrine) Gland: Submaxillary Salivary Gland

A photomicrograph of a submaxillary salivary gland shows the secretory units of
a compound tubuloacinar gland. The grapelike secretory acinar elements (1)

are circular in transverse section and are distinguished from the longer secretory
tubular elements (7) of the gland. Empty lumina can be seen in some sections
of both types of secretory elements. This salivary gland is a mixed gland and
contains both the mucous cells (4), which stain light, and serous cells (5), which

stain dark. Draining the secretory elements of the gland are excretory ducts (3,
6, 8). The small excretory ducts are lined by simple cuboidal epithelium and
surrounded by connective tissue (2), which also surrounds all of the secretory
elements.

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