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Lip (20X)

Microimage
Image copyright: Mathias Nordvi, ARR. (Tissue stain: H+E).

This is a section through a lip. You can follow the epithelium covering the surface of the lip. The outer surface is covered by the skin. On its surface, you'll find a thin, keratinized layer of epithelial cells (no nuclei to be seen).

Below the epithelium, you'll find connective tissue, glandular tissue and the orbicularis oris muscle.