Like humans, animals have sensory organs are well developed.Only in some more developed hearing, while others - vision.Animals use them to determine what is happening around.Animals that are exclusively nocturnal (cats, owls, mice) can use their vision to increase even the faintest light.And living in constant darkness (cave salamander, moles) are characterized by the small size of the eye, or the lack thereof.The sense of smell, taste, hearing - all of these senses of animals there.And they help them to survive in the harsh world of the environment.
Senses fish
sense organs in fish are about the same as in the rest of the vertebrates, only in their structure, there are significant differences that are caused by adaptation to the sacramental life in the water.In addition to the standard 5 sense organs in fish and have a so-called "sixth sense" that the loss of land animals.And it is - a lateral line organ.
With essential organs of taste, smell wonderful fish feel the slightest changes in the environment, the concentration of hydrogen sulfide and carbon dioxide, and so on. N. The fish can distinguish between the nature of the nearest ground, feel the touch, and even feel the pain.The whole complex of these influences perceive the feelings cells that are located in the skin and internal organs.
Fish olfactory organs are closely located in the nostrils that the fish are not through, and a little like a small two-necked flasks, located on top of both sides of the snout.The severity of their sense of smell is extremely high, especially for catfish, burbot.
organs of taste fish are some clusters of sensory cells called taste buds.They are plentiful in fish pharynx, oral cavity, on the antennae, gill arches, chin and even in the skin of the body.
temperature sensory organs in animals, especially in fish, very finely developed.It was established experimentally that the fish can distinguish such subtle variations in the amount of heat that are hundredths of a degree.But such a sharp enough sensitivity characteristic only of the nature of underwater animals.Temperature changes can be seen only with special nerve cells that are located in the skin at the points of heat and cold.
lateral line organs definitely plays a huge role in the daily life of the fish:
- help them withstand specific, predetermined distance from one another in the pack;
- help orient;
- helps to feel the approach of enemies or, on the contrary, food organisms.
hearing organs perceive as almost all fluctuations in the aquatic environment, but only a more harmonious, high-frequency or sound.
Fish naturally shortsighted.After the light in the water badly distributed.Their eyes are always open, as there is no age.The lens spherical that allows you to capture excellent large amount of useful light rays.The field of view is large enough.However, each eye gives its own image, that is monocular vision in fish.Intrinsically fish and distinguish colors.
Senses insects
vision of insects is of great importance in their lives.The main features of the eye caused by facet structure.Insects are by nature short-sighted - the area within reach of a clear vision and no more than 1-2 cm. They see great color and movement, including ultraviolet.
odor of insects stereochemistry special feeling.Sensory cells in insects (those that perceive the smell) are located in almost all on the antennae (and legs or other appendages).Each antenna can move independently, so the insects perceive the smell along with the direction and space, for them it is a common feeling - surround smell.
These are the sensory organs in animals.They are all very different and very interesting.
