Dermal Friction
Ridge Dermal friction ridges are raised skin on the hands and feet. They are used by police and professionals to identify individuals because these ridges are unique, like a fingerprint. This is known as dermatoglyphics. Dermal friction ridges are also used in medicine to detect genetic disorders and to determine the sex of an unborn child. The ridges are also studied by anthropologists to analyze the migration of peoples throughout history.
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