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: -The papillae give the dermis a bumpy surface that interlocks with the epidermis above it, strengthening the connection between the two layers of skin. On the palms and soles, the papillae create epidermal ridges. Epidermal ridges on the fingers are commonly called fingerprints (see Figure 10.4.

Detailed explanation-3: -Dermal papillae are the protrusions of dermal connective tissue into the epidermal layer. Rete ridges are the extensions of epidermis into the dermal layer.