Friction Ridge Skin: Morphogenesis and Overview
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چکیده
The friction ridge skin occurs on the palmar sides of the hands and the plantar sides of the feet of all primates, including humans. As the name implies, the skin is ridged to produce friction. The friction aids in grasping and walking. The friction ridge skin also contains numerous sweat glands, and the pore openings are located along the tops of the ridges. The friction ridge skin does not contain sebaceous (oil) glands or hair follicles. In addition to the ridges, creases are found cress crossing through the friction ridge skin. These creases, in addition to the furrows between the ridges, permit flexibility of the skin. Figure 1 shows the friction ridge skin on a foot, palm, and finger; arrows point to ridges (R) and creases (C).
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