Know in this post the characteristics of nematodes, you will find here all the information about their habitat, reproduction, classification, life forms and much more, come with us and find the most complete and varied information about these interesting worms.
Taxonomy
With a rather peculiar taxonomic shape, nematodes are distinguished thanks to their cylinder-shaped profile. We can find it in much of the planet, managing to live in warm and tropical areas, thus adapting to completely temperate climates.
It is usually known that their life develops through a receptor organism that houses them in their body, being a parasite that manages to live fully in said spaces. In this way, in its entirety, the nematodes are presented through diseases, completely affecting the recipient's organism.
This group of animals that have a worm shape, are grouped under a taxonomic group, being classified as follows:
- Animalia Kingdom
- Domain: Eureka
- Superphylum: Ecdyszoa
- Phylum: Nematoda
- Kinds: Andenphorea
Characteristics of nematodes
Nematodes have various characteristics, which will be defined throughout this post. Among the most outstanding features of these we can mention the following:
Nematodes usually live in fairly arid types of soil, mostly living in places provided with a large amount of fresh water, this habitat being their complete preference. Its life function is to carry out the parasitization of plants and animals which, throughout its cycle, it feeds on continuously. From a few millimeters to approximately half a meter, nematodes are defined by being completely variable in size.
As for its body, later we will be explaining the anatomy of said animal, however you should know that these are known for their round shape, quite similar to a cylinder.
- Their oral region is composed of various characteristics that define them quickly and progressively. Counting with approximately 7 mouths accompanied by at least one very good structure composed of teeth, hooks among other natural instruments that were granted to it.
- On the other hand, it is worth mentioning that nematodes in their adult life have characteristics that are really impressive, since when the animal reaches adult life, its body becomes much stronger, due to the large number of muscle layers it contains.
- When it comes to feeding nematodes, this is usually based on different styles. Among the diet of these we can highlight the following foods:
- blood ingestion
- Absorption of destroyed tissues
- digest intestinal contents
- Absorption of nutrients as liquids of both plants, animals and human beings, due to this, it is quite common to find parasites in cats, dogs and other kinds of animals.
Nutrition
Nematodes are defined as heterotrophs, this means that they have the extraordinary ability to condense nutrients. Since these are parasites, they usually consume most of the food that is inside the receptor that houses them.
These are some of the nutritional functions that nematodes fulfill in their life cycle. Being in some cases quite negative since these remain infiltrated in organisms or bodies in which they exert an influence that generates detriments in the receiving organisms. Causing high-impact effects.
They have been classified nematodes, within the group of eukaryotes, from which it is deduced that their DNA has a nucleus that contains a specific number of chromosomes, taking into account that the number is not entirely the same in most specimens.
The stage of development is very decisive in this type of organisms, taking into account that they go through a series of processes, among which the following can be appreciated:
- ectoderm development
- mesoderm
- endoderm
In this way, full development is achieved, leading the animal to obtain a healthy and completely healthy life, until adulthood. Another characteristic of nematodes is the completely identical shape that they contain in both parts of their morphology, being made up of a strip that identifies them exactly, allowing both parts to be the same at sight.
As for their system, they have an internal shape that science calls a pseudocele. Like plants, sexually they can reproduce sexually asexually, although the sexual style is the practice they commonly carry out.
Another interesting fact about the nematodes, is the way in which they are presented in the development stage, being this determined by means of eggs, being the larvae the most common presentation among them, by means of this procedure, in the case of being successful, when one of these manages to participate, they are carried out certain changes that help the development of the different stages.
Anatomy
As we have mentioned, the nematodes They have a morphology that is characterized by elements that are classified as vermiform, this means that they do not have any type of segments in their body. It is taken into account that they have a body endowed with a multiplicity of layers in various forms, among them we find the following:
- Musculature
- epidermis
- Cuticle
- Managing to contain two parts in its body structure, which are divided into the front and the back
Body characteristics of nematodes
Regarding these two parts of his body, studies have shown that in the previous structure it is possible to find the cavity of the mouth, which tends to contain a kind of teeth. While the back has different characteristics depending on the gender we are talking about, since the females have very different characteristics from the males of this species.
internal anatomy
As we have already observed, nematodes have a well-defined body structure, endowed with various aspects, in this opportunity we will address the internal structure that they have, that is, we will talk a little about the system they have in their organism.
- Digestive System
Like humans, nematodes contain a digestive system that has the necessary characteristics to digest and process the food they are about to eat, they have the same orifices, understood as the mouth to digest, and the anus to evacuate. Organs that fulfill an adequate and determined function in their bodies.
As for their mouth, you will be surprised to know that these animals not only have a mouth, but also teeth that allow them to chew successfully, however, not all of these species have this advantage of have teeth.
For its part, when it comes to digesting, the food passes mainly through an organ called the pharynx, which gives way to the food that they intend to digest, and then closes and does not open more. Following this, we managed to find the intestine, through which the function of absorption of the vitamins contained in the food they digest is fulfilled. And finally, the year.
- Nervous system
According to the studies carried out, it is known that the nervous system of these animals is not really complex, neither in its form nor in its structure. Taking into account the simplicity that it presents inside, which is known to be made up of some nerve fibers, which extend to form a chain around the pharynx.
- Excretory system
This system is taken into account that it does not appear in the same way in all the animals of this species, presenting some diverse forms, among the most common ones are found those systems that contain a structure in the form of a tube, and other structures in the form of a tube. of gland.
This system has 2 tubes that are connected to each other, through a kind of fissure that allows hooking and union between one tube and the other. While the one that has the shape of a gland, it contains 2 kidney cells, which have an average size, which in turn end before an excretory pore.
- Reproductive system
As for the reproductive system, it is very varied, depending on the species in question. The females, on the other hand, have an ovary and sometimes with good pairs. Those who manage to connect to a kind of oviduct, which are determined to fall on a seminal container.
On the other hand, the males of this species contain testicles. In the case of the male reproductive system, there is a testicle, a vas deferens, the seminal vesicle, and the ejaculatory duct. In addition to this, they present copulatory spicules.
Classification of nematodes according to their characteristics
This genus of nematode can naturally be classified into 2 specific types of classes which are subdivided into five varieties, among them we can highlight the following:
- secernentea
- andenophorea
- Class adenophorea
They represent a type of nematode that is made up of various morphological characteristics, coming to possess a complex number of glands called esophageal glands and a varied number of well-defined sensory organs.
As for the organs defined as sensory, it can be noted that the most outstanding among them are a class called amphibians, which are characterized by containing a sack-like shape. As for the morphology of their body, they are characterized by obtaining a body protected by a tenacious cuticle and which in turn is accompanied by 4 additional layers.
In the case of having the excretory organ, it should be borne in mind that this is found laterally in some, although it is usually very common that this type of organ is not present. In this class of nematode it can be highlighted that they live regularly, in a great diversity of environments. Among which its location can be planted, in some marine, forested spaces, and even in biodiversities provided with fresh water.
This type of class manages to be classified in:
- oenopila,
- Chromadoria
In this case between characteristics of nematodes, there are some completely different aspects, mainly the softness of the morphology that contains the body of these animals must be taken into account. Being its sensitive parts a key element in its morphology, and that these are endowed with various ovals.
The development of your existence in this class is completely free, however we must emphasize that there are another variety of classes available for the full development of your skills. Among which is the full stay of said parasite within a living organism.
Subclass Chromadoria
In the case of this classification, it is known that they have 3 esophageal glands. Accompanied by a large number of nematodes that share the same characteristics.
A characteristic that it shares with the aforementioned class, it should be noted that they also have a style of bodies that are defined thanks to the softness of their skin, which is completely smooth, although unlike the previous class, they present a series of rings or rings in its morphological extension.
Sercernentea class of nematodes and their characteristics
An organ known for its ability to excrete, from which the title of said nematode is derived. Containing this excretory element is a tube base endowed with a large, very well defined surface, which I have already performed a great miracle.
As for his pupil, you will be surprised at the reality, since they have various layers that are registered as one of his most essential organs. In this case it is very prudent that these have varied characteristics. Which are usually quite differentiated thanks to gender, since females have great characteristics that allow them to be identified and defined in a concrete and distinguishable way.
It is very unusual, but in the case of nematodes, the females have very marked and well-defined characteristics, being larger than the males of this species, however, it is worth mentioning that the males have a large advantage, by having spicules as an important part of its tail. And in the case of females, the tail is represented by a kind of spike or needle, which is classified into the following classes:
- spiruria
- rhabditia
- spiruria
We should mention that these classes are not usually mentioned regularly. In this case, various orders that are scattered in different phases of the Sercernentea class are mentioned and taken into account, in this way, various orders are found, among which the following stand out:
- Camallanuda
- Spiruride
- strongilyda
- rhabditia
- Ascaridid
- diplogasteride
- Tylenchid
- Drilonematide
Below we will develop some classes of those already mentioned, where the most representative characteristics of their order are reflected.
- ascaridian order
This is one of the most distinguished and popular orders, among which the worms can be mentioned, which have some quite outstanding characteristics, they have 3 lips around the mouth, as well as wings on each of the parts. sides of your body. This being cream colored and resistant in appearance.
It is known that this order of parasites are generally located in the body of animals, including mammals, although they have also been found in the body of human beings.
- Spirurid order
In the case of the organisms belonging to this classification, it is important to highlight that they have really defined pairs of lips. Just as it has a very well composed esophagus, which is endowed with 2 structures, divided into two faces containing these different characteristics, since the posterior face has an extensive glandular shape, while the anterior face is defined by a wide muscle extension.
These have a specifically parasitic characteristic, so in some cases they request the help of some type of arthropod animal, so that in this case the life cycle of the parasite can be carried out and specified. As an example of this, we should mention the flies, who intervene positively in the life of this class of parasites. As for the organs that make up its parts, these have a multiplicity of organs that have large levels of sensors that in turn contain a kind of location.
- Rhabditida order
A great variety of worms are defined under this order of parasites, these being known as those that make life in animals, staying clandestinely in their organism. Although its existence has also been confirmed in plants.
These have an exorbitant amount of lips, these being a total of 6 lips that are located at the level of the mouth, in terms of their appearance, they usually have a pale, bone white color. It should also be noted that they have a large family of parasites.
- Order Strongylida
This order is usually very present in farm animals, since it is a main actor in terms of the spread of diseases that occur in certain animals, such as pigs, horses, among others.
In the case of these nematodes, the life cycle is defined by the intervention of the receptor that inhabits them in which the insects develop optimally, in some cases they develop independently. As for their measurements, according to studies, they have shown that they have different sizes, that is, there is no standard measurement for all orders.
Features of nematode reproduction
As in the case of plants, nematodes have a very similar rhythm or sexual cycle, since they have a form of reproduction that is inclined towards asexual practice in some cases, and sexually in others. Both practices are usually carried out in a different way, thus finding some groups of nematodes that carry out sexual reproduction on a regular basis, while another group is limited to practicing sexual reproduction.
asexual reproduction of nematodes
In this case, define the asexual reproduction in animals, as that practice that does not require the presence of sexual cells, and as a result, physical contact between those involved is not necessary. There are various actions that are carried out through asexual reproduction.
In the case of the females of this species, reproductive cells develop, which also have an ovule that in turn divides, giving way to a new life form, which will later be considered an offspring. In this case, this new organism is considered to be able to survive in the face of the environmental mechanisms that favor its development.
Sexual reproduction
La sexual reproduction in animals It is one of the most common forms not only in mammals, but we can also find it in this type of parasite. Since it is a practice that they commonly carry out. In this case, reproduction is carried out in a different way, which occurs through sexual cells of both the female and the male participate in the act, from which a new living being develops.
As in the mechanism of many animals and in turn humans, fertilization takes place in the female's body, which takes a stipulated time through a process that will allow the growth of the offspring successfully.
The males, on the other hand, have an organ called spicules, which functions as a bag, where it contains the gametes that are later deposited in the female's body, to later give way to the miraculous fertilization.
These, like birds, are positioned and called under the oviparous classification, since the way of reproduction is carried out through eggs. In this case, thanks to this quality, it is recognized that the female is capable of reproducing large quantities of eggs, which can be thousands of them.
After the eggs the process determines to emerge into a new state, better known as a larva. Like butterflies, nematodes need to be processed through a mechanism that allows them to develop optimally and then move on to adult life.
Examples of nematodes (plant parasites)
- potato root nematode
- ectoparasitic nematode
- gall-inducing nematode
- cyst nematodes
- spiral nematode
- root knot nematode
- root lesion nematode
- burrowing nematode
- leaf nematode
- rot nematode
- Stem and bulb nematode