amphibians
amphibians:
They are a group of cold-blooded
vertebrate animals, which are distinguished by their ability to live in both
aquatic and terrestrial habitats.
Amphibians
are a Greek word meaning “double life.
Among
the amphibian species in the world, amphibians are considered one of the most
endangered categories of animals, due to their semi-permeable sensitive skin.
And
their porous eggs, which are able to easily absorb water and air from the
surrounding environment.
For this reason, these animals are easily and quickly affected by pollution in the air and water.
Which
animals are amphibians?
amphibians
 |
| amphibians |
What are the most prominent characteristics of amphibians:
Amphibians or amphibians are one of
the five basic groups that possess the characteristics of vertebrates and
belong to them.
They
are distinguished from other animals in that they can live in the aquatic
environment and on land, and that their skin is devoid of scales, and they may
reproduce in water or on wet land.
amphibians
Among
the most important categories of amphibians are frogs, Toads, salamanders,
salamanders, and ciclians (legless amphibians).
Together, their number is
approximately 7,400 different species that live in various regions of the
world.
They
inhabit all continents except Antarctica.
Amphibians
can be classified within the group of frogs and toads, and one in three of all
amphibian species in the world is
currently
considered threatened with extinction.
What
is called amphibian?
Below
are the most prominent characteristics of amphibians:
amphibians examples
Physical characteristics :
Below
are the most prominent physical characteristics of amphibians:
Walking on four legs, the amphibian
often has four legs that it uses to walk on land or push its body into the
water, and some of them - such as salamanders - also have a tail.
The wet skin of amphibians has moist
skin that helps them absorb oxygen dissolved in water to breathe while they
swim or dive in ponds and rivers.
Their
skin also helps them retain water when they emerge from it.
amphibians
vs reptiles
These
animals need to keep their skin moist all the time, and therefore they remain
in places as close to water as possible.
Possible,
even after it matures and fully grows.
The skin of amphibians is often
toxic, with glands capable of producing foul-smelling or toxic chemicals, and
may have bright colors that are considered a warning sign to their enemies.
It is characterized by its small
size.
Amphibians
are considered smaller than all other vertebrates, such as birds, fish, etc.
In
most cases, the length of an amphibian does not exceed fifteen centimeters, and
its weight does not exceed sixty grams.
The
smallest frog in the world is no larger than the size of the fingertip in an
adult human.
However, there are some large
amphibians, including the Japanese giant salamander, which is a creature that
inhabits freshwater rivers in Japan, and after its full growth, its length
may
reach more than one and a half meters.
amphibians
definition
What
is a amphibian easy definition?
Biological and behavioral characteristics :
The most prominent biological and behavioral characteristics of amphibians are as follows:
They are cold-blooded.
Amphibians
are characterized by being cold-blooded.
This
means that their body temperature changes in response to the temperature of the
surrounding environment, as their body temperatures always mimic the
environment around them.
This
stems from the amphibians’ lack of the ability to warm or cool their bodies
internally.
Therefore,
when it cools, it is forced to search for sunlight to warm itself, so it
becomes active, but if its temperature rises too much، She
must search for a shady shelter or an underground burrow to hide in.
What
are 5 characteristics of amphibians?
They are considered carnivorous
animals.
Amphibians
are considered carnivorous animals.
They
feed on insects and other small invertebrates.
From
this standpoint, these organisms are considered of great importance in
maintaining the balance of ecosystems (by preying on smaller organisms).They
are also considered of great benefit to humans, because they get rid of Many
agricultural pests and organisms harmful to crops.
Some large amphibians, such as
American calf frogs, can prey on somewhat large animals, such as snakes, birds,
and rodents such as mice and rats, and may devour other amphibians of their own
species, or from other species.
Most
amphibians benefit from their long and strong tongue to catch their prey and
attract it to it.
On
the other hand, amphibians have many enemies in nature.
Snakes,
birds, and many mammals are able to devour amphibians, and hence they rely on
camouflage to hide from them.
Breathing through the skin Amphibians
breathe through the skin.
Both
the circulatory system and respiratory system work with the skin membranes to
provide skin breathing.
Amphibian
skin contains various glands located in the spongy layer of skin, which in turn
support the vital physiological functions performed by frog skin, including:
Breathing, ion regulation, and water transport.
The exchange of gases, water, and
ions between amphibians and the environment occurs through a wide network of
skin capillaries.
In addition to percutaneous
breathing, amphibians also use different combinations of gill and pulmonary
breathing strategies, for example using the buccal pumping mechanism, in which
air is exchanged between the lungs and mouth.
Toxin-secreting glands The skin of
amphibians has an immune system, which is the first line of defense against pathogens
and harmful factors in the environment that may disrupt skin functions, or may
cause skin or systemic diseases, leading to the cessation of basic
physiological functions and ultimately the death of amphibians.
The skin of amphibians contains toxic
glands that release toxins.
It is
worth noting that some types of toxins are found in amphibians only, and are
generally used for self-defense against predators،
Mucous glands also secrete mucus to
maintain skin moisture, permeability, and elasticity, which is essential for
maintaining amphibian balance.
They
have eyes and good vision.
Amphibians
differ from other animals in terms of vision, as they have developed eyes that
contain eyelids, glands and associated canals.
They
also have muscles that allow them to be present both inside and above the head,
and allow them to perceive depth and see the true colors of objects.
Amphibians
have the ability to distinguish between different wavelengths of light waves,
and realize that these differences are differences in color gradation.
It is
worth noting that amphibians do not have retinal points (small points located
in the macula, which provide clearer vision), but their visual field is High
sensitivity.
The
amphibian's retina also contains four types of photoreceptors, which explains
its sensitivity to colors more than humans, and enables it to notice subtle
changes, but it often finds it difficult to distinguish colors when seeing a
fixed object and trying to observe it.
The ability to sense light energy Amphibians also have the ability to sense light energy using structures other than the eyes.
amphibians
Reptiles
meaning
Mammals
meaning
Amphibians
For
example, amphibian skin acts as a sensitive organ for this energy, often
replacing the need for vision.
It has an advanced hearing system.
Amphibians
also have an advanced hearing system, which is adapted in a way that suits
their environment.
Amphibians
have what is called an amphibious papilla, which is an organ composed of
sensory tissue, which is considered sensitive to low-frequency sound.
Which
enables them to hear low sounds.
An experiment was conducted on
salamanders, in which they were trained to come to food using a low-frequency
tone of voice.
A
group of salamanders responded to a sound frequency of 244 Hz, while other
groups responded to a sound frequency of 218 Hz.
Amphibian life cycle :
The
following is an explanation of the life cycle of amphibians:
Laying
eggs underwater Amphibians lay their eggs underwater and take care of them
until they hatch and are able to live on land.
Hatching eggs and living underwater
Amphibians usually live the early stages of their lives completely under the
surface of the water, like fish, as they have gills that help them extract
oxygen from water molecules.
When
they grow and complete their growth, their gills are replaced by lungs, and
then these animals become inclined to spend most of their time on land.
After
puberty, they return to the water again to lay their eggs in it later.
The young eat their food.
The
larvae initially feed on algae and plant materials, and they may be carnivorous
(in the case of salamanders), preying on small aquatic animals.
Changing
the composition of the young, these larvae need a few weeks or months to
complete their growth.
They
gradually lose their gills and replace them with lungs.
When
the lungs are complete In young people, they can breathe out of the water,
develop hind legs, and then front legs to help them walk، Her
eyes and entire digestive system also change to make her able to live on land
instead of water.
Coming out to land After larval
bodies develop, they go out to live on land instead of water.
pronunciation
Fish
meaning
The environment in which amphibians are found :
The
environments inhabited by amphibians vary somewhat, and the following are the
most prominent environments in which they prefer to live:
Wet
places generally prefer wet places, and therefore they are usually found around
bodies of water, including ponds, lakes, and rivers.
Tropical
regions Some amphibians can live in tropical forests, where they rely on
moisture coming from rain to find shelters for themselves and their eggs.
Examples
of amphibians that live In tropical regions; Tree frogs live in the forest,
where trees stick and never leave.
Dry areas Some amphibians are found
in arid and dry environments, where they hide underground throughout the hot
months of the year.
When
the rainy season comes and ponds and swamps form, these amphibians gather
around them very quickly to mate and lay eggs.
The larvae grow quickly before the swamp dries up and the environment returns to its previous state.
amphibious
Species
meaning
amphibious life:
Amphibians
go through two distinct stages of life: the larval stage and the adult stage.
Most
amphibians lay eggs, which in turn hatch and the larvae emerge from them.
Then
these larvae turn into adult amphibians, for example, frogs.
During
the larvae, stage frogs consist of gills and a tail that enables them to live
under them.
Then
the small larvae begin to lose their gills and the lungs begin to grow, and at
the same time their limbs begin to grow and lose their tails, and in the end
these larvae begin to grow.
They become adult frogs that spend
most of their time on the ground.
Amphibians
amphibian body temperature:
Amphibians,
like other reptiles, are cold-blooded creatures, which means that they cannot
produce enough internal heat to maintain a constant body temperature.
Their
bodies, for example, when it is cold outside, the body temperature of the
amphibians decreases, so they lie in the sun.
To
raise their body temperature, and when their body temperature drops, these
creatures enter a hibernation-like state, so they wake up only for short
periods to drink ، When it's hot outside,
amphibians hide during the day and only come out at night.
Amphibian
extinction:
Amphibians
face the risk of extinction.
According
to the latest statistics, 160 species of amphibians have already become
extinct, and more than 1,800 species are threatened with extinction.
Habitat
loss and degradation, pollution, climate change, and various diseases that
affect amphibians are among the most important causes that threaten the lives
of various amphibians.
Examples of amphibians:
Here
are some examples of amphibians:
Frog.
Crocodile.
The
turtle.
Seals؛
Penguin
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