51.1 MB (4.0 MB compressed)
3463 x 5161 pixels
29.2 x 43.7 cm ⏐ 11.5 x 17.2 in (300dpi)
SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
Black tongue, also known as black hairy tongue, a condition where the filiform papillae, the threadlike projections covering the surface of the tongue, become enlarged & covered with the growth of the bacteria Cryptococcus linguae. A pigment is also released. The condition is curable with the use of nicotinic acid.
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