Platyhelminthes

   Platyhelminthes  

The life journey of the animals in this episode is quite different. They live in the kidneys of humans or other animals.

However, some animals live inside or outside the organism as free-living 

Some species of this organism live in wet soils again  

Example: tapeworm, liver worm

Features

• Their bodies are intact, bilaterally symmetrical and pressed up and down.
  
  
  
• The body is much like a ribbon, leaf or blade.
• These are three-layered animals, i.e. three germinal layers are found in their embryos.
• The body cavity, the siloma, is absent, and the space between the internal organs is filled with mesenchyme.
• The body is covered by the synovial membrane.
• The excretory organ is protonefridium and there are many flame cells that participate in excretory function.
• Most animals use a hook-like sucking limb attached to the host's body at the front end.
• Nutrition is incomplete or absent.
• Respiratory and circulatory systems are missing.

photo :googol

 

Nidaria

Nidariya  say diploblastika (Diploblastic) refers to animals, the animals dbistara with the fetus. They were formerly known as Coelenterata. Most of these are marine, some freshwater inhabitants of the Greek word Knide meaning Rome or thorn and Aria meaning attached. The word Cnidaria is a combination of these two words. Scientist Hatschek in 18

Cnidaria was the first to name the episode. Due to the variety of colors, the members of this episode have contributed the most to the colorful appearance of the sea. Corals and coral wall forming animals are members of this episode. This is why Niederian animals are called the flower of the sea 

Features

Although some cells form tissues (e.g., neurons), most cells are isolated but specialized for specific functions.

• Diploblastic animals i.e. their embryos have two layers. The outer layer is the ectoderm and the inner layer is the endoderm. Between these two layers lies a substance called aqueous mesoglia, a liquid jelly.
• Adult animals also have two layers. The wide cavity inside the body is known as the gastrovascular cavity or coelenteron and it is exposed to a single perforated passage (the orifice).
• Radial symmetry means that the body can be divided evenly two or more times by intersecting along a single plane passing through the central axis of their body.
• The epidermis is surrounded by a large number of cells called cnidoblasts around the mouth, which contains a sac called the tomatocyst, which carries toxins, and a strap-like tube called a thread tube to apply the toxins.
• Acoelomate animals, i.e. body cavities or silos are missing here.

photo : googol

Perimeter

Perimeter 

Animals in this part of the animal kingdom are commonly known as sponges. These are usually marine and asymmetrical animals. These are primitive multicellular animals.

( : Porifera ) whose common name is  Sponge  ( : Sponge )

Is a kind of multicellular animal. The word Porifera is a combination of these two words. In 1836, the scientist Grant named the first circumference episode.

Features

• The multicellular body lacks specific tissues, tissues, organs and organ systems.
• Mainly unequal body, i.e. the body cannot be divided equally in any aspect.
• The ducts of the body are present which is a unique feature of this episode.
• Inside the body is a wide cavity called spongocytes covered by quinocyte cells which is exposed on the outside through a large pore called the occiput.
• The body wall has numerous small pores called ostia, which are formed by cells called porocytes.
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• Mature animals are immobile, meaning they are permanently stuck in an infrastructure.
• The body does not have pores or anus.
• They live alone or in colonies.
• All are aquatic animals, most of which are marine and some species are freshwater
• These are asilomatous or silomless animals

 

পরিফেরা 

প্রাণিজগতের এই পর্বের প্রাণীরা সাধারণত স্পঞ্জ নামে পরিচিত। এরা সাধারণত সামুদ্রিক এবং অপ্রতিসম (asymmetrical) প্রাণী। এরা আদিম বহুকোষী প্রাণী।

(:Porifera) যার সাধারণ নাম স্পঞ্জ (:Sponge)

হল এক জাতীয় বহুকোষী প্রাণী।  এ শব্দ দুটির সমন্বয়ে পরিফেরা (Porifera) শব্দটি তৈরি হয়েছে। ১৮৩৬ সালে বিজ্ঞানী গ্রান্ট প্রথম পরিফেরা পর্বটির নামকরণ করেন।

বৈশিষ্ট্য

• বহুকোষী দেহে সুনির্দিষ্ট কলা, কলাতন্ত্র, অঙ্গ এবং অঙ্গতন্ত্র অনুপস্থিত।
• প্রধানত অসাম্য দেহ, অর্থাৎ দেহকে কোনো দিক থেকে সমানভাবে ভাগ করা যায় না।
• দেহে নালিকাতন্ত্র বর্তমানে যা এ পর্বের অনন্য বৈশিষ্ট্য।
• দেহের অভ্যন্তরে কোয়ানোসাইট কোষ দ্বারা আবৃত স্পঞ্জোসিল  নামক প্রশস্ত গহ্বর বর্তমান যা অসক্যুলাম নামক বড় আকারের ছিদ্রের মাধ্যমে বাহিরে উন্মুক্ত।
• দেহপ্রাচীর অস্টিয়া  নামক অসংখ্য ক্ষুদ্রাকৃতির ছিদ্র বিশিষ্ট, এগুলি পোরোসাইট  নামক কোষ দ্বারা নির্মিত।
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• পরিণত প্রাণীরা নিশ্চল  অর্থাৎ কোন অবকাঠামোতে স্থায়ীভাবে আটকে থাকে।
• দেহে মুখছিদ্র বা পায়ুছিদ্র থাকে না।
• এরা একাকী অথবা উপনিবেশ গঠন করে অবস্থান করে।
• সকলেই জলজ প্রাণী যাদের বেশিরভাগ সামুদ্রিক সামান্য কিছু প্রজাতি স্বাদুজলের
• এরা আসিলোমেট বা সিলোমবিহীন প্রানী

Fauna

 

Fauna                                                                                             for bangla tape it                              

 

Today we will learn about the fauna

 

 

 

You will see that we have different animals around us, are they all the same size? Not everyone is one. Everyone has different sizes. For example, you have 1 more bird ...

 

But let's start without delay

 

That's one more thing

About 1.5 million species of animals have been found so far

They are all different so there is a rule to know them better. First we will look at its name

 Hierarchy

Sangha Hall of Degradation

= It needs to be arranged in order to know the large fauna easily and in an orderly manner and this method is called classification.

 

 

You would be surprised to know that all the people in this world are below, and above them are birds, then snakes, then frogs.

 

 You know ?? The similarity of animals in the animal kingdom, the order in which they are arranged according to their characteristics is called hierarchy

 

Today we will learn about the animals of the world in the episode of Animalia

                                                                Hierarchy

                    Episode

                                Periphery

                                .Nideria

   World                 .platihelminthes

Animalia ====    Nematoda

                               .Analida
                              . Arthropoda
                              .Malaska
                             . Ekainodaramata             Sub Part

                              kardata ========        iurokardata  
                  

             .Cefalocorda                           class        

                                                                          .Bhatibrata ======== .cyclostomata
                                                                                                                      . Chondrichthis
                                                                                                                       .Ostichthis
                                                                                                                      .Uvchar

                                                                                                                      | Reptiles

                                                                                                                       .   Bird species

                                                                                                                         *Mammals

 

 

 

 

 

 

 

This is the hierarchy of the animal kingdom

In the first 9 hours of this chat, 6 of them are invertebrates

And number 9 is vertebrate so let's say 1-6 invertebrates and number 9 is vertebrate

The names of Aristotle, John Ray, and Carolus Nilias are at the top of the history of this hierarchy.

And the naturalist Carolus Nilias is called the father of hierarchy.

He identified the characteristics of the first species and introduced the two-term naming system.

 

Scientific name Sanga = The scientific name of a pocket has   two parts or terms. This name is called scientific name.

 

For example, the scientific name of man is Homo sapiens    

      Scientific names are always written in English or Latin