Page 662 - Atlas of Histology with Functional Correlations

FIGURE 17.3 ■ High magnification of a type II alveolar cell in an alveolus.

Supplemental micrographic images are available at
www.thePoint.com/Eroschenko13e under Respiratory System.

FIGURE 17.4 | Olfactory Mucosa and Superior

Concha (Panoramic View)

The olfactory mucosa is located in the roof of the nasal cavity, on each side of
the dividing septum, and on the surface of the superior concha (1), one of the
bony shelves in the nasal cavity.

The olfactory epithelium (2, 6) (see Figs. 17.4 to 17.6) is specialized for the

reception of smell. As a result, its morphology appears different from the
respiratory epithelium. The olfactory epithelium (2, 6) is a pseudostratified tall
columnar epithelium without goblet cells and without motile cilia, in contrast to
the respiratory epithelium.

The lamina propria contains the branched tubuloacinar olfactory (Bowman)

glands (4, 5). These glands produce a serous secretion, in contrast to the mixed
mucous and serous secretions produced by glands in the rest of the nasal cavity.
Small nerves that are located in the lamina propria are the olfactory nerves (3,

7) and represent the afferent axons that leave the olfactory cells, continue into
the cranial cavity, and synapse in the olfactory (cranial) nerves.

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