Does anyone know what animals need moving the auricle
The Pinna is the part of the external ear, composed of cartilage tissue. Its function is to catch sounds and direct them to the eardrum. Humans, unlike animals, atrophied muscles, which brought this part of the ear into motion. And what animals need moving the ear? To understand this, you need to know how they have the organ of hearing and its role in their lives.
That means the hearing for the animals
All mammals, unlike human, can hear very well and can distinguish a variety of sounds. This is due to the fact that the bushes of the forest hard to navigate through the organ of vision: it is hard to find game or hidden enemy. And here comes to the aid of the organ of hearing. Not all people know the importance for many animals is the mobility of the ears. And it has to do with the fact that with the help of the organ of hearing they are getting much more information than through vision. They need to be able to hear sounds from all sides, and for this they do not have to turn your head. The hearing for the animals is very important, because all living creatures produce some sounds. And many of them he helps to navigate in the dark.
How does the auricle animals
Probably everyone watched as dogs feathered their ears and the horse nuzzled them to hear better. This is due to the importance animals have an auricle. The ear canal they have is a very important organ to capture a variety of sounds.Therefore, it was built primarily in the form of a funnel. Thus the animal easier to catch sounds coming from different directions.
The external ear in animals is a very complex structure: there is a few ear canal leading to the eardrum, and special tubercles, catching the direction of the sound. What animals need moving the ear? Ear them as a locator, it picks up sound waves. And to the best of their recognition of the auricle of many large mammals, have a conical shape or funnel shape. That's all you need in order to better recognize the sounds and their source.
Why are animals big ears
1. Sound is a wave, its receiver are to the eardrum. But in most animals they are small, this is done in order to avoid damage. Therefore, a sound wave you need to catch and amplify, because the sound must be strong enough to cause vibrations of the tympanic membrane. And large ears able to capture the most subtle sounds and amplify them many times over.
2. The large size of the Pinna in many animals is and in order to be able to rotate them 180 degrees. This is, for example, the hare, to feel the danger behind, without turning his head. This animal is a striking example of what animals need moving the ear.
3. Some nocturnal animals also have large ears, like bats. Such auricle help them navigate in the dark. They emit ultrasonic waves and big ears as locators, catch them after reflection from different obstacles.
4. Another function of the large ears in animals is thermoregulation. Please note that all animals that live in the desert, even the hedgehogs have large ears. And they are more for cooling than for catching sounds. This is illustrated by the elephant. His large ears are very mobile, but hearing that this animal is not very sharp. The elephant flaps its ears to cool off and ward off pesky insects.
What animals need moving the auricle
To understand this, you need to imagine the life of a predator, and especially the herbivores in the forest. He should be able to focus on one case, for example, stalking prey or food, and at the same time, he needs to hear what is happening behind his back and side. In this he just help moveable ears. They turn towards the slightest sound and catch him. And both ears can turn in different directions. Know that owners of dogs with erect ears that are constantly watching their pet turns one ear towards the sound. The antelopes and goats every ear turned in the direction of the sound source independently of the other. In addition, many inhabitants of the forest is very important to establish not only the direction from which sound is heard, but the exact location of its source. For these purposes, and used mobile ears in animals.