At a mucocutaneous junction, epithelium transitions to epidermis, lamina propria transitions to dermis, and smooth muscle transitions to skeletal muscle. A mucocutaneous zone is often the site of an arterial anastomosis, a watershed area of venous and lymphatic drainage, and sensory (but not motor) nerve overlap.
Winkelmann (1959) reported the mucocutaneous boundary is a "specific erogenous zone with rete ridges where the nerve endings rise closer to the surface."
- Norman Eizenberg, General Anatomy: Principles and Applications (2008), p. 96.
- Winkelmann RK. The erogenous zones: their nerve supply and significance. Mayo Clin Proc 1959;34(2):39-47. PMID 13645790
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