GENERAL HISTOLOGY

Detailed explanation-1: -The epidermis lies on the finger-like projections of the upper layer of dermis known as the dermal papillae. These dermal papillae cause the overlying epidermis to fold into ridges on the fingers that are called fingerprints, which are unique to each individual.

Detailed explanation-2: -In mucous membranes, the equivalent structures to dermal papillae are generally termed “connective tissue papillae", which interdigitate with the rete pegs of the superficial epithelium. Dermal papillae are less pronounced in thin skin areas.

Detailed explanation-3: -Fingerprints are the patterns that are left behind by friction ridge skin found in the palms and soles of the feet. The uneven projections found in the dermal papillae form the fingerprints, making the fingerprints remain even if parts of the epidermis is removed.