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Giraffe tongues have melanin, the same pigment that turns your skin dark when you get suntanned, or makes it dark from birth if your ancestry is in Africa.
Most parts of most mammals are covered in fur, so they're protected from the sun, but the exposed parts are at risk of sunburn and even skin cancer. That skin gets dark to protect it from sunburn: the dark granules absorb the sunlight, so it can't damage the other tissues. A giraffe is an herbivore, and it spends a fair bit of its life with its tongue out, licking the leaves off of trees.
If you look closely you'll find that only the front part is black. The part nearest the mouth, which is less exposed, is still pink. (Pink is the natural color of most tissues of the body, due to the presence of blood.)
So we infer that the black color helps protect it from tongue-burn!
Also see interesting animal facts
Bagikan
Do you know that giraffes have blue tongues?
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