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A Fingerprint Is An Impression Or Mark Made?

Decent Essays

A fingerprint is an impression or mark made on a surface by a person’s fingertips which are even more unique than one’s DNA. It is used to identify criminals thanks to Edward Henry. Francis Galton devised a method for classifying fingerprints. Henry Faulds was a Scottish physicians who is noted for the developments of fingerprinting. William Herschel was a British IAS officer in India who used fingerprints for identification on contracts.

The five layers of skin are stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, and stratum corneum. The stratum basale consists of basal cells. The dermal papillae, which increases the strength between the epidermis and dermis, are found there. All keratinocytes are produced here, as …show more content…

Stratum lucidum is a smooth, seemingly translucent layer of the epidermis located just above the stratum granulosum and below the stratum corneum. It is only found in the thick skin of the palms, soles, and digits. The keratinocytes that compose the stratum lucidum are dead and flattened. Packed with eleiden—clear protein, rich in lipids— derived from keratohyalin, which gives the cells its transparent appearance and provides a barrier to water. Stratum corneum is the layer exposed to the outside environment. The increased keratinization of the layer gives it its name. This layer prevents dehydration of underlying tissues while also providing a mechanical protection against abrasion for the more delicate, underlying layers. Cells in this layer are shed periodically and are replaced by cells being pushed up from the stratum granulosum. The entire layer is replaced during a period of four weeks. Cosmetic procedures help remove some of the dry, upper layer and aim to keep the skin looking fresh and healthy.

Keratinocyte is present in the basal layer and makes up ninety percent of cells found in the epidermis. Sweat glands are small tubular structures that produce sweat. Sweat glands are found only in mammals. There are three types of sweat glands, the exccrine sweat

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