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Livedo reticularis is a common skin finding consisting of a mottled reticulated vascular pattern that appears as a lace-like purplish discoloration of the skin. [1] The discoloration is caused by reduction in blood flow through the arterioles that supply the cutaneous capillaries, resulting in deoxygenated blood showing as blue discoloration ().
Recent assertions that the term "black" has never been used in the Irish language to describe people have been brought into question, which does indeed use the term dubh to describe white people with swarthy features, [25] different from the use of gorm (literally "blue") to describe those with melanated skin. [26]
Black hair is the darkest and most common of all human hair colors globally, due to large populations with this trait. This hair type contains a much more dense quantity of eumelanin pigmentation in comparison to other hair colors, such as brown, blonde and red. [1]
Many babies are born with blue eyes, and then their eyes change color as their genes continue to develop. ... More melanin means darker eyes, hair or skin. The color of the melanin in the eyes is ...
The most studied black hair gene is MC1R which causes the body to produce a protein called melanocortin. [3] This protein causes hair follicles to produce a type of melanin pigmentation called eumelanin. [3] Black hair has the highest concentration of this pigmentation with brown, blonde and red hair following behind. [3]
Both the eyes and legs are still of the normal colour. Leucism (/ ˈ l uː s ɪ z əm,-k ɪ z-/) [2] [3] [4] is a wide variety of conditions that result in partial loss of pigmentation in an animal—causing white, pale, or patchy coloration of the skin, hair, feathers, scales, or cuticles, but not the eyes. [4] It is occasionally spelled leukism.
Blue hair does not naturally occur in human hair pigmentation, [1] although the hair of some animals (such as dog coats) is described as blue. Some people (typically of East Asian descent) are born with black hair that is so dark that it appears to have a metallic blue luster. In Japan, the beauty ideal for a woman is to have glossy "blue-black ...
Later Xenophanes of Colophon described the Aethiopians as black and snub-nosed and the Thracians as having red hair and blue eyes. [76] In his description of the Scythians, Hippocrates states that the cold weather "burns their white skin and turns it ruddy." [77] [78]