How many teeth have a large shark: a scheme of jaw, gill arches, the number of teeth and rows of shark teeth

How and why the jaw of the shark is arranged. What does the jaw of the shark consist of? Scheme and facts.

Content

The sharks have huge jaws with many sharp teeth. In this article you will find everything that science knows about the jaw of the shark and how it is arranged and why.

The jaw of sharks, teeth, dentitions: how many, how are they arranged and why?

The most important part of the jaw of the shark is, of course, the teeth. The shark teeth are located in two rows. Why? The reason is that sharks are constantly using teeth to hunt and grind food. Shark's teeth are weapons of attack and defense. Therefore, in its entire life, the shark can lose all the teeth. This is due to the fact that they are weakly attached to the jaw.

Unlike human ones, they do not have roots that would support them in recess. Because of this, when the shark bites meat, the tooth due to the rigidity of the fibers can remain inside the prey. Therefore, the second row of teeth plays the role of reserve. If the shark has no teeth on the front row, she will be able to use the second and third.

An important fact: the ability of sharks to lose their teeth is also a means of self -defense. When the shark hunts, she opens the mouth wide and bites the victim. In the process of this, a piece of prey can take the entire mouth, and the shark cannot breathe. And she breathes by swallowing water and extracting oxygen from it. In this case, the shark is easier to separate several teeth from the front jaw, release prey and then attack again. Otherwise, it may lose access to oxygen.

Do not forget about shark diseases that also damage the teeth and lead to their loss. The sharks also have a plaque on the teeth because of which caries or toothstone occurs. This problem that sharks faces is very similar to what is happening with a person’s teeth.

Also, how the shark teeth are located, has a direct connection with how oxygen enters the lung shark. The shark breathing process occurs as follows: the shark opens the mouth, water enters it. After that, thanks to the gills, oxygen enters light sharks. For this reason, the mouth of the shark should not be closed completely all the time in the water. And the teeth grow so that the shark is more convenient to swallow water and extract oxygen from it.

How the jaw of the shark is arranged - the structure of the jaw of the shark

All the sharks existing on Earth in our time, the jaw device does not differ. Therefore, if you know how the jaw of one type of shark is arranged, you can confidently say that the jaw of another type of shark is also arranged.

The main parts of the jaw of the shark:

Pay attention to the front, the front section of the skull (in a scientific “visceral”). A jaw arc is attached to it (another name "Visceurial arc"). It consists of two main parts: palatine cartilage and meckel cartilage. The ligaments hold, fasten two of these components of the ligament together.
The first cartilage is called non-quarter because of its shape and location. It replaces the upper jaw, and the lower cartilage, which is called Meckel Cartoon, does what the lower jaw does.
Behind the first arc you will find a subsidiary. Its components are three cartilage: one of them in solitary quantities, and the other two duplicate each other.
The first cartilage - the one that does not have a double is called scientists of the hymandibular, for brevity with a suspension. It easily moves from side to side and directly with the help of ligaments is attached to the skull in the area of \u200b\u200bthe auditory department. From the other, the opposite end, the suspension has a jaw arc and hyoid, the pair department of the sub -language arc.
How are hyodes attached to each other? The correct answer: they are attached to each other with the help of cartilage. Also, the same cartilage is attached to the language of the shark itself.

An interesting fact about the language of the shark: it, unlike human, consists not of muscles, but of tissues of two types: consisting of mucus and the one that is commonly called connective.

The jaw of the shark is attached to the skull due to the upper element of the sublingual arc. This type of attachment of an arc with a brain is called hyostilia.

Gill arches in the jaw of sharks

Without The gills of the shark will not be able to breathe. They are the reasonable reason that oxygen enters the light shark. The shark periodically draws water into a ajar jaw. Already from here she comes to the gills, and oxygen begins to enter the light sharks. That is why the jaw of the shark is always slightly ajar, so that, if necessary, it could quickly enrich her body with oxygen. And the location of the teeth in the jaw helps her to do this as efficiently as possible.

The gills are connected to each other by attaching cartilaginous coples. They partially fraught with each other. Why are gills arranged in this way? This has its own reason.

Before you find out, add another important fact. There are small processes in the gills of sharks, thin and resembling stamens. They are placed in such a way as to be at the same level with each other. For what?

Due to its location of the stamens in the gills of the sharks, which are attached through cartilage to the jaw, prevent the loss of large volumes of food through the gills. Because of this, the shark can hunt less and immediately digest a larger amount of food than if part of it fell back into the water through the gills. Thus, we can conclude that the gills not only help the shark breathe, but also contribute to the savings of the energy and time of the shark.

The structure of the jaw of the shark - how is it unique?

The main weapon of sharks is her teeth. Even a person who has never read about the structure of the jaw of the shark knows how sharp and dangerous they are. They are located in two rows. The number of teeth reaches ten thousand. And the record holder for the number of teeth is a whale shark. The total number of teeth is fifteen thousand.

Another amazing fact about the teeth of the shark. The scientists found that they were a kind of scales. But more acute and tough. They include dentit. However, the roots of the teeth are very small. The second row of teeth plays the role of spare. If the shark has no teeth on the first jaw, she will be able to use others from the second or third jaw.

How will the shark replace the lost tooth if the teeth are near and the rest of the teeth on the jaws are still intact? This happens very much millet, a tooth located on the back jaw is automatically displaced forward. Because of this, he does not have the same root as the human tooth. Thanks to this, the tooth can easily move and stand in place of the lost.

Sharks often change their teeth, as a prevention or because of diseases such as caries. Such predators as tiger sharks change their teeth with whole jaws, and for the entire period of their existence, tens of thousands of teeth replace each other.

The structure of the jaws of the sharks is identical. However, the shape of the teeth of one shark differs from the shape of the teeth of another shark. For example, in a white shark teeth have the shape of rectangles, with even edges. To break the prey, a white shark is enough for one row of pointed-zazubrin spaces on each tooth. But at a more dangerous predator - a tiger shark on each tooth there are two rows of Zazubin.

The record holder in length is the teeth found in excavations and reach a length of 15 centimeters. It was established that they were part of a shark of an extinct look called Megalodon.

The speed with which some teeth of the shark replace others depends not only on circumstances, but also on the type of shark. For example, in representatives of the type of lemon shark, they change every seven days. And in a large white shark, to ensure that the teeth naturally replace each other in the front jaw for about 240 days.

The shape of the teeth always has very sharp edges, with which the shark easily breaks what got into its mouth. Due to the device of his jaw, the shark can bite off and swallow large pieces of meat in a very short time. Although the speed of eating in horror films is really exaggerated, in nature, Akuta can also be dealt with its prey in a very short time.

The number of teeth can be different among sharks of the same species, but of different ages. With an increase in the number of years, the number of teeth increases. Also, shark teeth often suffer from a collision with boards, oars, surfing boards and boats.

Shark power consists of large marine animals, such as seals and sea seals. Their skin is very strict and sometimes you need to break it up with a few of your teeth. Sharks chose these animals as their extraction precisely because their bodies contain a large amount of fat. And fat is necessary sharks for large energy reserves that will give them the opportunity to move quickly, maintain the necessary body temperature and get their food.

The jaw of the shark is arranged so that the shark can survive and feed herself

Thus, we can conclude that the structure of the shark jaw and the location of its teeth are formed due to many factors such as: production, the need for fast movement, the need to receive oxygen from the water and swim with a jailed mouth, the presence of dental diseases and most importantly, constant use teeth and the need to replace lost ones.

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