How do snakes move? The way the snake moves

Most snakes crawl by the change in the distance between the scales on their abdomen. The snake's body had large scales on its ventral surface, which were arranged one by one like tiles on the roof, and the ridges were turned backwards so that they could hold the ground. Therefore, you can imagine that if the scales on the front of the snake's body first come into contact with the ground, the body part behind the contact point shrinks, and the distance between the scales in the back half will be reduced, and the back part will be able to move forward.

Then, the back of the snake's body is in contact with the ground, and the distance between the scales before the point of contact becomes longer, so that the front of the body also advances. By alternating this, the snake is able to crawl freely on the ground. However, snakes do not divide their bodies into two parts when crawling, as is described here, but move in a very coordinated and fluid manner.

Of course, there is a disadvantage to this type of exercise, which is that it is relatively slow.

Snakes have no limbs, and when they walk on land, they rely on some of their specialized organs to cooperate with each other, moving in a straight, wavy, sideways, telescopic, and jumping manner.

The main organs involved in the movement of snakes are: snakes have a number of 141 435 vertebrae that are firmly connected to each other and flexible; Almost every vertebrae in the trunk are connected to a pair of ribs; with wide ventral scales; It has strong muscles associated with the vertebrae, ribs, and abdominal scales. The interaction of these organs allows the snake to make various movements and walk.

The way of movement of the snake is crawling, and there are three ways for the snake to crawl, one is the curved movement, one is the crawler movement, and the other is the telescopic movement. Snakes are a class of animals under the phylum Chordates and Reptiles, which belong to ectotherms, with a low degree of evolution, and their distribution and survival are greatly affected by climate, and are a stable and fragile biological group.

Snake. Snakes inhabit different environments depending on the species, and the habitat is diverse, some live in caves, some live on the ground, some live in trees, and some live in water.

Snakes are ectotherms that change body temperature with air temperature, as snakes themselves do not have a well-developed thermoregulatory mechanism to produce and maintain a constant body temperature.

Snakes are a special group of organisms that have evolved over a long period of 100 million years and play an important role in maintaining ecological balance.

No. Pythons often swim at night, and with the help of their large vertebrae, they can easily move quickly on the road or on branches close to the ground without attracting attention. Unlike most snakes, pythons move in a straight line, mainly due to their heavier weight.

Propagating contractile waves that occur in the parietal muscles of Demodex and hollow organs of various animal flesh, especially the digestive tube, are a unique form of muscle movement. The former moves the animal's body, while the latter pushes the contents of the organ forward. Peristalism is caused by the independent, automatic sexual activity of the nervous system formed by the smooth muscle system of the longitudinal muscles, the annular muscles, and the longitudinal nervous system that innervates both (the abdominal medulla in Demodex animals and the digestive tract as a network of nerves).

The beating of the heart of a mature individual of a lower animal or the beating of the heart of an embryo of a higher animal is a form of peristalsis. In addition, in the large intestine and duodenum of mammals, mild retroperistalsis that restricts small intestinal transport occurs in parallel with regular peristalsis, which is called antiperstalsis. The creeping advance of the animal body is most typical in earthworms and so on; The walking movement of leeches (loopingmovement) and the foot waves of gastropods are also a kind of peristaltic movement in nature.

The first way:

It's a meandering movement that all snakes are able to crawl forward in this way. When crawling, the snake body makes a horizontal wavy bend on the ground, so that the back of the bend exerts force on the rough ground, and the reaction force of the ground pushes the snake body forward, if the snake is placed on a smooth glass plate, then it will be difficult to move an inch, and it will not be able to crawl in this way, of course, there is no need to worry about the snake, because in nature there will be no smooth ground like glass.

The second way:

It is a crawler-like movement, the snake does not have a sternum, its ribs can move freely back and forth, and there are costal skin muscles between the ribs and the abdominal scales. When the costal muscles contract, the ribs move forward, which causes the wide scales to erect in turn, that is, slightly upturned, as if they were stepping on the ground.

But then the costal muscles relax, and the back edge of the abdominal scales exert force on the rough ground, pushing the snake body forward by reaction, and the effect of this movement is to make the snake crawl forward in a straight line, like a tank.

The third way

It is a telescopic movement, the front of the snake body is lifted, stretched forward as much as possible, when it touches the supported object, the back of the snake will follow the retraction forward, and then lift the front of the body to stretch forward to get the support, and the back part will retract forward, so that the snake can continue to crawl forward. Snakes that crawl slowly on the ground, such as lead-colored water snakes, will quickly expand and contract continuously when alarmed, speeding up the crawling speed and giving people the feeling of jumping.

Wriggling, wriggling, wriggling, wriggling.

The body wriggles, = =, that's how the snake moves. Seeking adoption,

The reason why snakes can crawl is because they have a special way of locomotion: one is a meandering movement, and all snakes can crawl forward in this way. When crawling, the snake body makes a horizontal wavy bend on the ground, so that the back of the bend exerts force on the rough ground, and the reaction force of the ground pushes the snake body forward, if the snake is placed on a smooth glass plate, then it will be difficult to move an inch, and it will not be able to crawl in this way, of course, there is no need to worry about the snake, because in nature there will be no smooth ground like glass.

The second is the crawler movement, the snake does not have a sternum, its ribs can move freely back and forth, and there are costal skin muscles between the ribs and the abdominal scales. When the costal muscles contract, the ribs move forward, which drives the wide abdominal scales to erect in turn, that is, slightly warped, the upturned abdominal scales are like stepping on the ground, but at this time only the abdominal scales move and the snake body does not move, and then the costal skin muscles relax, the posterior edge of the abdominal scales exert force on the rough ground, and push the snake body forward by reaction, and the effect of this movement is to make the snake body crawl forward in a straight line, just like a tank. The third way is the telescopic movement, the front of the snake body is raised, stretch forward as much as possible, when it touches the supported object, the back of the snake will follow the retraction forward, and then lift the front of the body to stretch forward to get the support, and the back part will retract forward, so that the snake can continue to crawl forward.

1. Meandering and crawling.

2. Shrink forward.

3. Crawl in a straight line.

4. Side-by-side travel.

Interpretation] 1. Meandering and crawling: the most common method of movement of snakes, commonly seen in small and medium-sized snakes walking on rough ground. The snake body swings alternately to the left and right sides, causing the snake body to form a side wavy shape and crawl forward, usually when walking quickly between hard ground and tree branches.

2. Contraction and progress: accordion-like contraction and extension. It is commonly found in burrow-dwelling snakes or other snakes crawling in tubular or narrow spaces.

The back half of the snake's body bends and contracts into many segments, fixed like an anchor, and the head and front of the snake are stretched forward, and when the snake's body is fully straightened, it bends and contracts, then straightens, and so on.

3. Crawling in a straight line: It is commonly found in some large snakes such as pythons. Using the scales of the abdomen as a support point, the body is pulled forward by friction against the ground, and the strong muscle contraction on the side of the body pulls the body forward.

4. Side-by-side travel: basically similar to shrinking forward. Use one end of the body as the support point and move the other end, except that the back half of the body is pressed against the ground first, and the head and the front half of the head are lifted to the front side.

After the first half of the body touches the ground, the second half is pulled up and moved forward, repeatedly, keeping the body partially in contact with the ground to avoid being burned by the hot ground. It is commonly found in snakes that inhabit sandy or smooth ground.