African calabaris were the thickest skinned snakes in the
world: their skin is 15 times thicker than that of other snakes, and the
structure of the collagen layer under the scales is reminiscent of the
rhinosis of the rhinoceros.
Under the microscope, the calabarium skin looks different than the skin of other snakes: its scales are shorter. Below them is a layer of ordered collagen filaments. The protein strands of each underlying layer are perpendicular to the proper fibrils; the authors of the work note that collagen is also organized in the skin of rhinoceroses. Despite the thickness of the collagen, calabarium skin remains flexible and allows snakes to wriggle no worse than relatives with less dense covers. This feature has already attracted the attention of the pharmaceutical company, whose specialists hope to repeat the structure of the skin of the snake and to make durable surgical gloves that do not constrain movements.
Such a thick and durable skin calabarias have acquired for the hunting of mice. These snakes eat only young mice, which are attacked in the presence of their parents; The skin of the snake must withstand the bites of sharp incisors of adult rodents. For the same reason, the head of the calabaria forms slightly different from the tail; hunting the cubs, the snake deceives their parents, substituting the tail for a more vulnerable head.
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