basement membrane pillaries

Figure 9.41 (a) Anatomy of the urethra and vagina; drug-delivery systems for both are available. (b) For other than local vaginal treatment, transport through the absorbing membrane structure (squamous epithelium (SE) lamina propria (LP) and muscularis (M) (not shown)) is important in securing systemic levels of drug; inadvertent absorption after local therapy is, of course, possible.

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