skin that covers the palms fingertips and soles of the feet
stratum lucidum
title: Sole (foot) text: Sole (foot) The sole is the bottom of the foot. In humans the sole of the foot is anatomically referred to as the plantar aspect. The glabrous skin on the sole of the foot lacks the hair and pigmentation found elsewhere on the body, and it has a high concentration of sweat pores. The sole contains the thickest layers of skin on the body due to the weight that is continually placed on it. It is crossed by a set of creases that form during the early stages of embryonic development. Like those of the palm, the sweat pores of title: Human skin text: the epidermis, called the "papillary region", and a deep thicker area known as the "reticular region". The papillary region is composed of loose areolar connective tissue. It is named for its fingerlike projections called "papillae", that extend toward the epidermis. The papillae provide the dermis with a "bumpy" surface that interdigitates with the epidermis, strengthening the connection between the two layers of skin. In the palms, fingers, soles, and toes, the influence of the papillae projecting into the epidermis forms contours in the skin's surface. These epidermal ridges occur in patterns ("see:" fingerprint) that are genetically and epigenetically determined and title: Hand text: contrast, the hairy skin on the dorsal side is thin, soft, and pliable, so that the skin can recoil when the fingers are stretched. On the dorsal side, the skin can be moved across the hand up to ; an important input the cutaneous mechanoreceptors. The web of the hand is a "fold of skin which connects the digits". These webs, located between each set of digits, are known as skin folds (interdigital folds or plica interdigitalis). They are defined as "one of the folds of skin, or rudimentary web, between the fingers and toes". The ratio of the length title: Sole (foot) text: without furrows. In bonobos, the pattern intensity of the epidermal ridges (i.e. "fingerprints") of the palms and soles is considerably higher than in chimpanzees. Whilst the pattern intensity in the palm is the highest of all species of apes, in the sole, the density decreases and is comparable to other apes. The sole is subject to many skin diseases. Sole (foot) The sole is the bottom of the foot. In humans the sole of the foot is anatomically referred to as the plantar aspect. The glabrous skin on the sole of the foot lacks the hair and pigmentation found elsewhere title: Hand text: is tightly bound to the underlying tissue and bones. Compared to the rest of the body's skin, the hands' palms (as well as the soles of the feet) are usually lighter — and even much lighter in dark-skinned individuals, compared to the other side of the hand. Indeed, genes specifically expressed in the dermis of palmoplantar skin inhibit melanin production and thus the ability to tan, and promote the thickening of the stratum lucidum and stratum corneum layers of the epidermis. All parts of the skin involved in grasping are covered by papillary ridges (fingerprints) acting as friction pads. In