Final answer:
The boundary between the epidermis and dermis is wavy, denoting the interface between the two skin layers in mammals.
Explanation:
The boundary between the epidermis and dermis is histologically noted for its appearance of being wavy. The epidermis is a thin layer of skin composed of keratinized cells that serves as a barrier to pathogens, while the dermis is thicker and contains blood vessels, glands, and nerve endings.
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