Why haven t snails become extinct yet?

On the belly of the snail there is a wide, thin transverse fold with a pointed posterior end, 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.

So it will crawl slowly. The ventral surface of the snail has long, flat feet, which advance by muscle contraction, secrete mucus to help walk and reduce friction, and shiny when dry, so it moves slowly. Snail Features:

Three slow, two fast, one difficult, one more. The three slows are slow movement, slow mating and slow egg laying; The second fast is fast growth and fast shrinkage; One difficulty and one more are difficult to lay eggs and many eggs. <>

Snail is not a biological taxonomic name, but generally refers 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 snail is the largest in Africa, measuring more than 20 cm. Several species of the genus Snail in Europe are often used as delicacies, especially in France. Snails are the most common mollusks on land, and they have high edible and medicinal value.

There are three types of animals that crawl slower than snails: seahorses, sloths, and polyps.

1. Seahorse: It is a small marine animal with a length of 5-30 cm. Seahorses are slow to move and have a top speed of centimeters per second, but they are very effective at catching fast-moving, hiding-minded copepods.

2. Sloths: They move slowly, it takes 12 seconds to take a step, and they only walk meters per minute on average, and can only walk 100 meters per hour, which is slower than the turtle, which is known for its slowness, and is the slowest animal in the world. The sloth is the only wild animal with vegetation on its body, and although it has legs, it cannot walk, relying on its forelimbs to drag its body forward.

3. Polyps:

How many meters does it climb per hour, the polyp can climb 200 meters per hour, the body is cylindrical, and there are eight or more tentacles, and the tentacles ** have mouths. Multi-grouped, combined into a group, shaped like a tree branch.

1. Because the snail relies on the friction between the peristalsis of the muscles and the ground.

In order to help walk and reduce friction, the snail constantly secretes mucus, which increases the difficulty of moving, so it climbs very slowly.

2. There is a wide and thin transverse fold on the snail's abdomen, and the back end is pointed, which is its "foot". When a snail crawls, it uses its feet to cling to other objects, by the abdominal muscles.

With a wavy creep, it can crawl forward slowly. At the same time, there is a gland on its foot, called the foot gland, which secretes a mucus that helps it crawl, and the stickiness of the mucus causes the snail to move more slowly.

The snail has limited body structure and can only crawl at a slow speed.

The body structure of a snail is a mollusk whose body is covered with shells and needs to contract muscles to generate movement force during movement. Due to the weaker muscles of the snail, the hood culture is slower when crawling. In addition, their gastropods are also easily obstructed, such as uneven terrain or obstacles, which can also affect their movement speed.

In addition, snails also need to stop frequently to rest and forage for food, as their metabolism is slower and takes more time to digest and absorb nutrients. So, although the crawling speed of snails is slow, it is enough for them to adapt to their living environment.

<>, because the snail relies on the peristalsis of the muscles and the friction of the ground to move, and the snail will continue to secrete fluid in order to keep the body moist, which makes it more difficult for the snail to move, so the crawling speed of the snail is very slow.

Because it relies on the peristalsis of the muscles and the friction of the ground to move the body, and in order to keep the body moist, it constantly secretes water, which increases the difficulty of moving, so it climbs relatively slowly.

Snails are invertebrates, phylum mollusks, gastropods, lungs, 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.

<> snail climbs slowly because it is a mollusk that can only move its body by relying on muscle wriggling to create friction with the ground. And when moving, the snail will also secrete a lot of mucus in its abdomen, which further increases the difficulty of moving.