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When iridophores are affected by axanthism, the animal typically becomes duller or darker in coloration due to a lesser amount of light reflected. [2] Typically it is only the skin that is affected, and the eyes still have iridophores. The opposite of axanthism is xanthochromism, which is an excess of yellow coloration.
Alfred Blaschko, a private practice dermatologist from Berlin, first described and drew the patterns of the lines of Blaschko in 1901. He obtained his data by studying over 140 patients with various nevoid and acquired skin diseases and transposed the visible patterns the diseases followed onto dolls and statues, then compiled the patterns onto a composite schematic of the human body.
Melanistic black eastern grey squirrel (Sciurus carolinensis) Melanistic guinea pigs (Cavia porcellus) are rare, and are used in rituals by Andean curanderos. [1] Melanism is the congenital excess of melanin in an organism resulting in dark pigment.
This is an accepted version of this page This is the latest accepted revision, reviewed on 22 January 2025. "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 ...
Old Lace was created by Brian K. Vaughan and artist Adrian Alphona and debuted attacking the other characters in Runaways #2. [2] Old Lace was given her name by Gertrude Yorkes after she had taken the code name Arsenic, making the pair Arsenic and Old Lace, which is a reference to a movie and play of the same name. [2]
The raptor is taken to the base for examination. Hodges soon theorizes the regeneration of Velociraptor and Asexual Reproduction of T. rex. Once recovered, the injured Velociraptor wakes up and begins to attack. The T. rex also appears and kills a soldier before escaping with the Velociraptor to an agricultural transport ship. With Marines ...
The Fitzpatrick scale has been criticized for its Eurocentric bias and insufficient representation of global skin color diversity. [9] The scale originally was developed for classifying "white skin" in response to solar radiation, [2] and initially included only four categories focused on white skin, with "brown" and "black" skin types (V and VI) added as an afterthought.
Skin colors according to von Luschan's chromatic scale. Von Luschan's chromatic scale (VLS) is a method of classifying skin color. It is also called the von Luschan scale or von Luschan's scale. It is named after its inventor, Felix von Luschan. The equipment consisted of 36 opaque glass tiles which were compared to the subject's skin, ideally ...