In humans, there is an average of 10,000 lingual papillae.And they are all concentrated in one place - in the language.According to the one neurophysiologist and, concurrently, a specialist in fish, from catfish length of 15 centimeters taste buds is not less than 250 000. And they had located all over the body. That is, in what place you will touch him not, he will always feel what you taste. If it is, of course, not fried.2. Bats "see" our circulatory system
Bats (the kind that is called "vampires") - the only mammals that feed on blood. With this eating habits linked extraordinarily subtle development of feelings, through which, by the way, the bats have received from Mother Nature a very unsightly nose. This feeling allows the animal to "see" the blood coursing through your veins. Nose "vampire" is equipped with a kind of infrared detector responsive to changes in body temperature - at a distance.This is the surprising because other mammals, including us, you have to touch the subject to say it warm or cold. But the most striking another: they are able to determine which Vienna is most interest to them. Their "heat sensors" is so perfect that they do not have to waste time, several times running teeth into the flesh of his victim. "Vampires" go directly into the vein, and always on the first try. 3. Narwhal tusk - a giant sensitive organ
For a long time scientists have wondered why this strange narwhal tusk, sharpening head. And finally figured out. First of all, turned out to be the tusk does not even tusk and tooth. One (sometimes two) long, curved spiral tooth covered ten million nerve endings. Studies have shown, for example, that its tooth plucked can determine the degree of salinity of water. Why should they? The salt content affects the freezing water. And if you live among ice floes and breathe air, it is important you know that at any moment you will be able to rise to the surface. So tusk-tooth - a device that is able to predict the formation of ice. Not only. It can determine the temperature of the water pressure, and if it is raised in the air - and that the barometric pressure. 4. Fish ghost hunts and conducts surveillance at the same time, with the help of a mirror
Fish-ghost (family Barreleye) - one of the most unusual occupants of the deep sea. Association with the nightmare she won thanks to the eyes - two large orange sphere. In order not to get caught in the teeth of a predator, the fish must be alert all the time - even when the hunt itself. That is, it needs visibility. And she had any. The eyes of fish ghost divided into two parts, so that she can look back and forth and in the same time. It would be like to have an extra pair of eyes on the back of the head. Only in the case of our fish is not a single pair of eyes, and a complex system with built crooked plates resembling a mirror that capture subtle glow of half a kilometer below the surface. That is, it is probably not even eye on his head, and a pair of special glasses with built-in mirrors that allow you to see what is happening behind. When the fish goes ghost hunting, small chёrnenkie eyes that you see on the sides, looking for a future meal. And that looks like a big orange eyes from above - is the other side of the mirror surface, which picks up the biological glow and warns of predators. 5. Clam with stony eyes
Chiton or tunic to look at anything interesting in itself is not - for woodlice like. But he has something really striking - stone eyes. We do not want to say that this creature's eyes look like stone. They consist of aragonite - the form of limestone, the one who is a member of mollusk shells. And no stone eye on clam shell may be several hundred. Shellfish somehow manage to achieve optical properties of the material from which we build houses, and "do "optical lens out of it ... How - it only scientist to figure out. And although vision in chitons not so much, but they are their stone eyes quite able to distinguish light from the shadows and even discern the shape of the object. Source: asaratov.livejournal.com
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