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Some turtles excrete more urea via the mouth than in the urine. |
Huffpo: "It is generally accepted that the kidney is responsible for the excretion of urea in vertebrates, except fish," said researcher Yuen Kwong Ip, a molecular physiologist at the National University of Singapore. "Contrary to this common notion, our results suggest that the mouth can be a major route of urea excretion in soft-shelled turtles. |