Incidental coloration Animal coloration

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the olm s blood makes appear pink.



some animals coloured purely incidentally because blood contains pigments. example, amphibians olm live in caves may largely colourless colour has no function in environment, show red because of haem pigment in red blood cells, needed carry oxygen. have little orange coloured riboflavin in skin. human albinos , people fair skin have similar colour same reason.









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