After Wang Zhan inspected the type of soil in the cave, he found that it was okay, and if there was an accidental explosion, there would be no problem. Pen "Fun" Pavilion www.biquge.info

The whole team thought about it for a long time, and finally decided to go deep into the cave on a sunny day to investigate, in fact, Wang Zhan had seen a lot.

Regarding the types of snakes, Wang Zhan has read about them in books.

According to the current classification system, it can be divided into 3 suborders and 11 families.

(1) The suborder Scolecophidia is divided into the family Scolecophidia, the family Heteroscale snake and the family Scolecophidia.

(2) The suborder Henophidia is divided into pythons, tubular snakes, needletails, endoscaly snakes and scrofula.

(3) The new snake suborder (Caonophidia) is divided into the family of Snakes (there are multiple subfamilies), the family Cobraidae (there are subfamilies of cobras, flat-tailed snakes and sea snakes) and the Viperidae (there are subfamilies of white-headed vipers, subfamilies and subfamilies of vipers). With the exception of most of the vibraea, this suborder is venomous snakes.

It is said that snakes are "afraid" of realgar. Wang Zhan decided to take advantage of this and try his luck.

Realgar is the common name of tetraarsenic tetrasulfide, also known as stone yellow, goldstone, cockscomb, usually orange-yellow granular solid or orange-yellow. The statement that snakes are afraid of realgar is actually incorrect. After many experiments, it has been shown that the snake is not afraid of realgar, but just does not like realgar and the pungent smell emitted by some items made of realgar, such as realgar wine.

Wang Zhan had prepared some, if there were too many snakes, so that weapons could not solve the problem, he would try to use realgar.

Not long after entering, Wang Zhan encountered some small snakes, and there were a lot of them, but they didn't fight Wang Zhan.

The snake's walk is determined by the snake's structure, whether it walks in a straight line or winds its way forward. The snake has three parts: head, torso and tail. Between the head and trunk is the neck, the boundary is not obvious, and the trunk and tail are bounded by the cloacal foramen. Snakes have no limbs and are covered with scales all over their bodies, which have the effect of protecting the skin. Snakes are divided into venomous snakes and non-venomous snakes, and the head of non-venomous snakes is generally conical, with a thin front end and a thick rear end; Poisonous snakes have a triangular shape; The trunk of the snake is long and cylindrical; The tail of the snake is the part after ****.

The number of snakes Wang Zhan encountered began to increase, and the snakes on the four walls of the cave kept swimming nearby. The teammates were very scared, and asked Wang Zhan, the number of snakes here has increased.

Many of the snakes here are still carnivorous, for example, there are snake bones all over the ground, and dead corpses are proof of this.

Wang Zhan used the realgar, and many snakes avoided it from afar, so it was slightly better.

After a pause, Wang Zhan and the others were reading a book in a cold corner, about the structure of the snake.

The internal structure of the snake is divided into ten parts: skin system, skeletal system, muscle system, respiratory system, digestive system, cloaca system, nervous system, sensory organs and chromosomes. Snake Breathing: The snake's respiratory organ is the lungs.

Snakes have no transient membranes, lacrimal glands, and active eyelids; absence of tympanic membrane, tympanic atrophy, loss of Eustachian tubes; The oval window of the inner ear is connected by the auricular column bone between the oval window and the square bone; no temporal fossa (but it is a descendant of the bitemporal fossa, and the skull of the snake has no trace of the bitemporal fossa due to the degeneration or disappearance of a large number of membranous bones); degeneration of the bone-bearing and sternum; anterior concave vertebral body; With the exception of the atlas and caudal vertebrae, the rest of the vertebrae have movable ribs attached; Paired internal organs are symmetrical to staggered front and back or retain only one side due to their body shape (pythons have paired lungs); No bladder.

Wang Zhan understood a little, but he also began to wonder why there were no snakes nearby now. So they continued to look at the material.

The snake is a reptile due to the special way it has locomotion: one is a meandering movement, in which all snakes are able to crawl forward. 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 is difficult to move an inch, and it cannot 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 mode 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 lifted, 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. Snakes that crawl slowly on the ground, such as lead-colored water snakes, will quickly expand and contract continuously when they are alarmed, speeding up the crawling speed and giving people the feeling of jumping. In addition, snakes have a sense of hearing, but their hearing organ, that is, the structure of the ear, is very simple, only the inner ear, and there is no outer ear and tympanic membrane structure, so the sense of hearing is very dull.

Wang Zhan thought in his heart, it turned out that this was the case, and if he understood this, maybe he could effectively avoid or escape when he encountered a group of snakes.

Suddenly, one of my teammates exclaimed, "Wow, oh my God, there's a big snake shedding its skin!"

Wang Zhan also woke up, it turned out that there were few snakes in the vicinity because of this. It's already very deep into the cave here, and it shouldn't be abnormal to see a big snake.

The molting of snakes is repeated at regular intervals, and snakes molt throughout their lives. Before molting, snakes stop eating and hiding somewhere safe. During molting, the snake's skin becomes dull and dry, and their eyes become cloudy or blue. Moisture is generated on the inside of the old leather, which separates the old and new leather. After a few days, the snake's eyes were clear again, and the snake's skin had been removed. The old skin is stretched open from the mouth, and the snake tries its best to pull out of the old skin by constantly rubbing against external objects (mostly rough ground or stones). In many cases, the old snakeskin is shed from the head to the tail, and the old skin is like a sock that has been removed, while the new skin underneath the old skin appears newer, larger and shinier.

The snake in front of me looked like it was powerful, with a huge body and swollen muscles. Every detail shows the power of this power.

It's just that this snake hasn't moved yet. Wang Zhan saw that it was molting and decided to withdraw.

The surroundings were very quiet, and when the big snake saw Wang Zhan and the others, he just didn't move, and finally sizzled one or two times.

This is not a casual call. The snakes in the cave suddenly became active.

Wang Zhan had only walked a few steps when he encountered a snake that was rushing quickly, and everyone was stunned. Fortunately, Wang Zhan was quick and used realgar, and then the team began to evacuate.

Someone still wanted to fight, but he was knocked down by the snakes in a few clicks, if he hadn't taken the antidote in advance, and Wang Zhan took out a rope to pull him, I'm afraid that person would have been a corpse by now.