GENERAL HISTOLOGY

Detailed explanation-1: -Epidermal ridges increase friction and enhance the gripping ability of the hands and feet. Patterns of these ridges are genetically determined and unique to each person.

Detailed explanation-2: -The fingerprints are produced from a layer in the skin called the papillary layer, which is a layer within the dermal layer of skin. It produces an extra thick layer to form the ridges of fingerprints.

Detailed explanation-3: -A finger-like projection, or fold, known as the dermal papilla (plural = dermal papillae) is found in the superficial portion of the dermis. Dermal papillae increase the strength of the connection between the epidermis and dermis; the greater the folding, the stronger the connections made (Figure 5.1.