The structure of snails: curious features

One of the first creatures that appeared on Earth were snails. Counting a huge number of varieties in shape, size, distinctive features, they live in almost every corner of the planet, playing an important role in its ecosystem.

Surely every person at least sometimes wondered: what is the structure of the snails? Do they have eyes, ears, teeth, brain?

The structure of the cochlea can be considered by the example of a giant representative of the class of Bruins-Akhatina, a resident of the tropical African forests, which has gained popularity as a pet. Simplicity of content, omnivorousness, lack of smell, unpretentiousness and affection (each individual knows his master well) are the factors that make such a unique creature a favorite in many houses. In captivity, akhatin can live for about 10 years.

The structure of the cochlea

The structure of the ahatina - the largest representative of land mollusks, quite simple: head, trunk and shell, the size of which can reach 25 centimeters.

On the head there is a mouth opening and tentacles - long and mobile, with eyes at the end. The ability to see surrounding objects in akhatin is measured only by a distance of 3 centimeters. In this case, the snails are very sensitive to light, especially to the bright, the intensity of which is perceived not only by the organs of vision, but also on the photosensitive cells located on the body.

The snail's mouth is equipped with teeth (about 25 thousand pieces), only not in the usual sense. This device is called "radula", which is a small "grater" and adapted to grind food.

The ears, unfortunately, do not have a snail, so they do not hear anything. Lack of hearing compensate for the clonk's olfactory organs: this is the skin of the anterior part of the body and small swellings located at the tips of the tentacles. The smell of chemicals (alcohol, gasoline, acetone) the snail is able to sense at a distance of 4 cm, the aroma of food will feel about 2 meters. The structure of snails, thanks to the same tentacles and sole - the organs of touch, gives them the ability to perceive the texture and shape of surrounding objects, thus acquainting themselves with the outside world.

Home pet - ahaatina

The structure of the snail of the ahatina, as well as the abilities, with interesting simplicity have interesting features. So, they are characterized by a long-term memory: the ahatiny can remember the location of food sources and return to them. Adult individuals have a permanent place to rest; When the snail is transferred to another place (within 30 meters), it will crawl to its native, more familiar. Young specimens are characterized by mobility and can travel long distances throughout the day; Also have the capacity for long-range migration.

Characteristic features and snails

The structure of the snails is due to their terrestrial existence, in connection with which the mollusks have a well-developed sole equipped with two foot glands, which secrete mucus, and letting through the waves of contractions. Such specific features determine the optimal easy movement of snails on a dry surface.

The wrinkled skin is on a par with the lung, which in a single specimen of the cochlea takes an important part in the respiratory process. The internal structure of the cochlea is characterized by the presence of the heart, kidneys, nerve endings. According to experts, snails are not able to experience pain. This strangeness is due to the absence of the brain and spinal cord, instead of which there is an accumulation of ganglia - the nerve nodes, which together form the nervous system of a scattered-nodal type.

Protective function of the sink

The snail shell, strong enough and massive, performs the following functions:

• Protects the soft body from damage of a mechanical nature during the movement;
• Protects against potential enemies;
• Protects the body of the cochlea from drying out.

The structure of the cochlea, or rather its shell, is directly influenced by the climatic conditions in which it lives. So, with high humidity, the shell is thin and transparent; In a dry and hot climate, its walls become thicker, and the color becomes white (reflects the sun's rays and protects the snail from overheating).

Meet: a snail of grape!

The structure of the grape snail is no different from the structure of other species: the same shell, trunk and head with tentacles. Is that the size, in contrast to the ahatina, an order of magnitude smaller. Yes, and the way of life is close to the field conditions, not to the example of domestic ahhatins. These are boundless fields, gardens, forests, where the most comfortable places for snails are raw moss, shade of plants or stones, under which you can hide from the heat.

The monotonously colored shell of the grape snail is spherical, it has a rounded shape and reliably protects the body of the mollusc from negative external factors. The leg, with which the snail moves, is large and muscular.

During the movement, glands are released by the glands, which softens the friction with the surface. The average speed of the grape snail is 1.5 mm / sec.

How do snails multiply?

The special structure of the snails directly affects the process of reproduction, in which each individual acts in the role of both male and female. To do this, two snails lead a love game, consisting of a thorough touching each other, and then a tight fusion of soles. In this way, the mollusks exchange sex cells. Eggs, covered with a nutrient shell and having a supply necessary for the development of substances, snails are laid in groups of 20-30 pieces in pits, which are then buried. After 2-3 weeks a young generation appears, which in 1.5 months turns into full-grown adult snails.