Slide 112 - Lip, showing the transition from keratinized (outside) to non-keratinized (inside) stratified squamous epithelium.  The slightly keratinized layer of the red portion of the lip (vermillion border) is very thin.  In the external thin skin, find typical hair, sebaceous glands, and sweat glands.  (The over-sized, bulbous hair follicles sometimes seen here are peculiar to the monkey lip).