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Jaundice, also known as icterus, is a yellowish or greenish pigmentation of the skin and sclera due to high bilirubin levels. [3] [6] Jaundice in adults is typically a sign indicating the presence of underlying diseases involving abnormal heme metabolism, liver dysfunction, or biliary-tract obstruction. [7]
Identifying human races in terms of skin colour, at least as one among several physiological characteristics, has been common since antiquity.Such divisions appeared in early modern scholarship, usually dividing humankind into four or five categories, with colour-based labels: red, yellow, black, white, and sometimes brown.
Amelanistic mammals have white hair, pink skin, and eyes that have a pink, red, or violet appearance. Reddish eyes are due to the lack of pigment in the iris pigment epithelium. When the stroma is unpigmented but the iris pigment epithelium is not, mammalian eyes appear blue. Melanin in the pigment epithelium is critical for visual acuity and ...
Albinism is a congenital condition characterized in humans by the partial or complete absence of pigment in the skin, hair and eyes. Albinism is associated with a number of vision defects, such as photophobia, nystagmus, and amblyopia. Lack of skin pigmentation makes for more susceptibility to sunburn and skin cancers.
Gilbert syndrome can sometimes cause the skin or whites of the eyes to turn a yellowish color, per Mayo Clinic. It is a genetic disorder passed on from one or more parents. It is a genetic ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 28 December 2024. "Skin pigmentation" redirects here. For animal skin pigmentation, see Biological pigment. Extended Coloured family from South Africa showing some spectrum of human skin coloration Human skin color ranges from the darkest brown to the lightest hues. Differences in skin color among ...
The last edition of the German encyclopedia Meyers Konversations-Lexikon (1971–79, 25 volumes) lists the following characteristics of the "Mongoloid" populations of Asia: "Flat face with a low nasal root, accentuated zygomatic arches, flat-lying eyelids (which are often slanting), thick, tight, dark hair, dark eyes, yellow-brownish skin ...
The extra skin cells form itchy, scaly, red patches. In addition to red, patchy skin, you may have joint pain or pitted or thickened nails. In skin of color, the rashes appear more dark brown or ...