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Heterochromia

In anatomy, heterochromia refers to a difference in coloration, usually of the iris but also of hair or skin. Heterochromia is a result of the relative excess or lack of melanin. It may be inherited, due to genetic mosaicism, or due to disease or injury. Eye color, specifically the color of the irises, is determined primarily by the concentration and distribution of melanin. The affected eye may be hyperpigmented or hypopigmented. In humans, usually, an excess of melanin indicates hyperplasia of the iris tissues, whereas a lack of melanin indicates hypoplasia. Heterochromia of the eye is of two kinds. In complete heterochromia, one iris is a different color from the other. In partial heterochromia or sectoral heterochromia, part of one iris is a different color from its remainder.
EAN: 9786130707668
Sprache: Englisch
Seitenzahl: 140
Produktart: kartoniert, broschiert
Herausgeber: Miller, Frederic P. Vandome, Agnes F. McBrewster, John
Verlag: Alphascript Publishing
Schlagworte: Iris NCSA Mosaic Pigment (Biologie)
Größe: 8 × 150 × 220
Gewicht: 227 g