How do snails crawl trouble tell me how snails crawl

Activity Objectives:1Get to know the snail and get a preliminary understanding of the characteristics of the snail's appearance.

2.Germinate children's interest in things, boldly express their ideas, and prepare for activities

2.Meet the snails.

Antennae, shell, feet, mouth.

Antennae: The snail's eyes grow on the pair of antennae that are long. The antennae of a snail are organs used to sense the external environment, and if they come into contact with an obstacle with their antennae, they will immediately change the direction they are traveling.

Among the snail's antennae, the short pair is equivalent to its nose, and there is a small mouth under the short antennae.

The flat feet under the snail's belly are like horizontal stripes like water ripples, and the snail crawls slowly by the fluctuations of the horizontal stripes.

will leave a shiny line.

In the process of crawling, the snail will secrete a secretion called the foot gland, just like a child sweats after exercise, the snail will also sweat, but it will flow a secretion called the foot gland.

When crawling, this secretion keeps flowing out to reduce friction and facilitate the snail to crawl, and it sticks to the crawling place while crawling, and when it dries, it becomes a glittering thread.

The snail is the animal with the most teeth in the world, it has around 26,000 teeth. Snails are amazing!

3.** "Snail" short film.

After watching the short film, we all know the little snail, who will tell you what you know about the snail, and see who is the good friend of the little snail.

4.Listen to the song "Happy Little Snail" to learn how to crawl a snail, and change direction to climb when you encounter an obstacle.

Now let's turn into little snails and take the house on a tour! Grow two little thin feet first, and then carry our house on your back, are the little snails ready? Let's go! (**Accompaniment).

We put the snail on a piece of glass and let it crawl slowly, we observed how the snail walked from the bottom of the glass, and found that the flat feet under the snail's belly were actually stripes, and these horizontal stripes were waving backwards like water ripples, and the snail was crawling slowly by the fluctuations of the horizontal stripes. We also found that there was a shiny line where the little snail crawled, and we thought it was very strange, and then we checked the encyclopedia, and the book said that there was a small thing called "foot gland" in the snail's foot, and the sticky glue-like thing was secreted by the foot gland. When crawling, this slime constantly flows out to reduce friction and facilitate the crawling of the snail, and it sticks to the crawling place while crawling, and when it dries, it becomes a glittering thread.

It's no wonder that we usually find a small snail along every shiny line on the wall. The whole body is divided into mouth, neck, body, abdomen, there are flat feet, tail, and its head has two pairs of antennae-like antennae, the front is small, the back is large, the back pair of antennae has a pair of eyes, and the back carries a spiral shell in the snail's abdomen with a wide and thin horizontal fold, and the back end is sharp, which is its "foot". When a snail crawls, it can crawl forward slowly by clinging its feet to other objects and wriggling in waves through its abdominal muscles.

At the same time, there is a gland on its foot, called a foot gland, which secretes a mucus that helps it crawl. ]

As a snail crawls on the ground, it stretches out its antennae to probe around, and when it hits an obstacle, it changes the direction of its original movement.

The snail has a spiral-shaped shell on its back, which protects it from shrinking its body into a shell when it is in danger. In winter, snails also secrete a mucus that, when dried, forms a thin film that seals the shell and better retains the humidity inside the shell.

The snail has two pairs of antennae on its head, one long and one short, and the longer pair of antennae located above the head have eyes. Snails have poor eyesight, so they need to sense their surroundings with the help of their antennae. As it crawls on the ground, it stretches out its antennae to probe around, and when it hits an obstacle, it changes the direction of its original movement.

The small antennae have an olfactory function and can use it to help find food.

The habits of a snail

The whole body of the snail includes eyes, mouth, feet, shell, antennae and other parts, the snail has a fragile, low conical shell, the head has two pairs of antennae, the latter pair of longer antennae have eyes at the tip, the ventral surface has flat and wide gastropods, slow movement, secrete mucus under the feet, reduce friction to help walking, mucus can also prevent ants and other general insects.

When a snail is infested with predators, its head and feet retract into its shell and secrete mucus to seal the shell. Determination of snail crawling speed: put a snail on dry ground and it will move 9 13 cm per minute, it will slow down when it climbs to shaded ground, it will move 6 8 cm per minute, and it will increase when it climbs to the ground with a thin layer of water, and it will slide 25 30 cm per minute.

The snail's climb to the tree is an instinct that has gradually formed in the course of long-term evolution in order to adapt to survival. Snails staple eat a variety of vegetables, weeds, melon peels, etc., while the tender plant leaves usually grow on the top of the plant. In addition, although snails like humid environments, they are prone to water accumulation in low-lying areas after rain, so they climb up to prevent drowning.

Snails refer to all terrestrial species of the class Gastropoda. In general, Western languages do not distinguish between aquatic snails and terrestrial snails, and in Chinese, snails only refer to terrestrial species, while snails in a broad sense also include giant shield slugs.

The snail is an animal that includes many different families and genera. Feeds on plants and lays eggs in the soil or on trees. It is more common on tropical islands, but some also live in cold regions. Arboreal species are bright in color, while terrestrial species are usually several close colors, generally striped.

The whole body of the snail includes eyes, mouth, feet, shell, antennae and other parts, and the spiral shell on the back of the body, its shape, color and size are different, and their shells are pagoda-shaped, top-shaped, conical, spherical, pipe-shaped, and so on. At present, the white jade snail, the cover snail, the scattered snail, the bright snail, the brown cloud agate snail, etc., all have their own unique appearance. The eyes of the snail grow on the back pair of antennae on the head.

When the snail crawls, it also leaves a line of mucus on the ground, which is a fluid secreted in its body, which can help the snail walk on a relatively steep surface, so it will climb walls.

Snails are invertebrates, molluscs, gastropods, lung snails, snails. The shell is generally low-conical, right- or left-handed. The head is conspicuous, with 2 pairs of antennae, and the apex of the large 1 pair has eyes. The ventral surface of the head has a mouth with a toothed tongue that can be used to scrape food.

It is said that there are only two animals that can reach the Golden Tower, and that is the snail and the eagle. The snail gold tower can be afraid, let alone a small wall. In fact, snails can secrete a kind of mucus, and the stickiness of the mucus can overcome the snail's friction against the wall.

It doesn't fall off, just like a gecko can climb a wall.

People go to high places, and snails are no exception.

Summary. Hello, there is a wide and thin transverse fold on the belly of the snail, and the back end is pointed, which is its "foot". When a snail crawls, it clings to other objects with its feet.

It relies on the undulating curvatures of its muscular foot to move forward, and at the same time, it has a gland on its foot, called a foot gland, which secretes a mucus that helps it crawl. And secrete mucus along the way to make it easier to move around rough ground.

Hello, please wait a while, in the inquiry information, in the preparation for your answer, thank you....Hello, there is a wide and thin transverse fold on the belly of the snail, and the back end is pointed, which is its "foot". When a snail crawls, it clings to other objects with its feet. It relies on the undulating curvatures of its muscular foot to move forward, and at the same time, it has a gland on its foot, called a foot gland, which secretes a mucus that helps it crawl.

And secrete mucus along the way to make it easier to move around rough ground.

Thank you for your inquiry and have a great day.