Vagina

The vagina shows three layers forming its wall, the mucosa, muscular coat, and adventitia. The mucosa is composed of nonkeratinized squamous epithelium rich in glycogen and lamina propria. The lamina propria is denser toward the surface

Figure 12 The two corpora cavernosa of the clitoris appear as sinusoidal vascular tissue separated by a septum composed of dense fibrous tissue of the tunica.
Figure 13 The vestibular bulb is composed of sinusoidal vascular tissue. Compared to the corpora cavernosa (previous figure), the vessels are larger and there is no fibrous tunica. The adjacent skeletal muscle is the bulbospongiosus.

where it characteristically forms delicate and long papillae, and looser toward the muscular layer (Fig. 14). In the anterior vagina, lamina propria papillae are scarce, but in the posterior wall, they are prominent. Numerous elastic fibers are found in the lamina propria. The deeper layers of the lamina propria contain a dense plexus of small veins. The muscularis contains large vessels. There are no glands in the normal adult vagina.

Figure 14 The vagina shows nonkeratinized squamous epithelium and a lamina propria composed of a superficial dense layer and deep loose layer in which there are large blood vessels.

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