Skin is the soft outer covering of vertebrates. Other animal coverings such as the arthropod exoskeleton have different developmental origin, structure and chemical composition. The adjective cutaneous means "of the skin" (from Latin cutis, skin). In mammals, the skin is the largest organ of the integumentary system made up of multiple layers of ectodermal tissue, and guards the underlying muscles, bones, ligaments and internal organs. Skin of a different nature exists in amphibians, reptiles, and birds. All mammals have some hair on their skin, even marine mammals which appear to be hairless. The skin is one of the most important parts of the body because it interfaces with the environment and is the first line of defense from external factors. For example, the skin plays a key role in protecting the body against pathogens and excessive water loss. Its other functions are insulation, temperature regulation, sensation, and the production of vitamin D folates. Severely damaged skin may heal by forming scar tissue. This is sometimes discoloured and depigmented. The thickness of skin also varies from location to location on an organism. In humans for example, the skin located under the eyes and around the eyelids is the thinnest skin in the body at 0.5 mm thick, and is one of the first areas to show signs of aging such as "crows feet" and wrinkles. The skin on the palms and the soles of the feet is 4 mm thick and the thickest skin in the body.
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Some articles on skin:
... In computing, a skin is a custom graphical appearance achieved by the use of a graphical user interface (GUI) that can be applied to specific software and websites to suit the ... A skin may be associated with themes ... Software that is capable of having a skin applied is referred to as being skinnable, and the process of writing or applying such a skin is known as skinning ...
... piece of dead tissue that is cast off from the surface of the skin, particularly after a burn injury, but also seen in gangrene, ulcer, fungal infections ... if a skin graft is to be conducted) ... extracts, were traditionally used in herbal medicine as topical treatments for localised skin cancers and can be effective in some cases, but often cause ...
... tiny muscles that are contracting are causing a "bunching" of the skin surrounding the hairs, which results in the "bumps" in goosebumps ... way of preserving its own heat by causing the hairs on the skin to stand up, thus reducing heat loss ... As the perspiration accumulates on the skin, it naturally evaporates ...
... Since the skin reaction is an allergic one, people may develop progressively stronger reactions after repeated exposures, or show no immune response on their first exposure, but show sensitivity on following ... of urushiol (two micrograms or less than one ten-millionth of an ounce) on the skin to initiate an allergic reaction (Epstein et al ... Severe cases will have small (1–2 mm) clear fluid-filled blisters on the skin ...
... Look up skin in Wiktionary, the free dictionary. ...
More definitions of "skin":
- (noun): An outer surface (usually thin).
Example: "The skin of an airplane"
- (noun): A natural protective covering of the body; site of the sense of touch.
Example: "Your skin is the largest organ of your body"
Synonyms: tegument, cutis
- (verb): Bruise, cut, or injure the skin or the surface of.
- (noun): A bag serving as a container for liquids; it is made from the skin of an animal.
- (noun): A person's skin regarded as their life.
Example: "He tried to save his skin"
- (verb): Remove the bark of a tree.
- (verb): Climb awkwardly, as if by scrambling.
Synonyms: clamber, scramble, shin, shinny, struggle, sputter
Famous quotes containing the word skin:
“Surely the day will come when color means nothing more than skin tone, when religion is seen uniquely as a way to speak ones soul; when birth places have the weight of a throw of the dice and all men are born free, when understanding breeds love and brotherhood.”
—Josephine Baker (19061975)
“The hand I burned and whose skin is shriveled like that of a mummys is less sensitive than the other to cold or heat. My soul is the same; it passed through fire.”
—Gustave Flaubert (18211880)
“For I know that my Redeemer lives, and that at the last he will stand upon the earth; and after my skin has been thus destroyed, then in my flesh I shall see God,”
—Bible: Hebrew, Job 19:25.