Characteristics of all the phylums of kingdom animalia in detail. Answer only if u know..!!
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Answer:
Explanation:
Scientists predict that only 15% of species are known to man from the estimated 8.7 million species. That leaves almost 85% species yet to be discovered. Only about 953,434 species of animals have been catalogued in the Animal Kingdom. Let us study this classification of animals.Classification of Animals and Plants
There are millions of living organisms in this world. There are some which are even yet to be discovered. These living organisms that are known to man, very broadly include animals, plants, microorganisms etc. All of them show great diversity. Yet, there are some characteristics that are similar between groups of organisms and this is what binds them together.
Classification of animals helps us to understand their characteristics, as well as their differences with other organisms. The best-known organisms are the animals. In scientific terminology, they are grouped under the Kingdom Animalia, better known as the Animal Kingdom. Let us learn more about this famous Kingdom!
Animal Kingdom
Kingdom Animalia consists of organisms that range from the simplest of the animal forms to the most complex. At one end of this classification of animals, you have the microscopic organisms. And at the other end, you see animals that you probably come across in your daily life. You and your friends, for example, are members of the Animal Kingdom. Your pet dog, bird, cat or even those pesky insects that you find in the gardens are all part of this gigantic kingdom.Scientifically speaking, all organisms that belong to this Kingdom are Eukaryotic organisms. They are all multicellular, with many cells present. The cells do not have cell walls in them. Another important feature is that they have a heterotrophic mode of nutrition, which means that they cannot make their own food.
The Different Phyla
Classification of animals is termed as Kingdom Animalia. It is further divided into different phyla. These are nothing but divisions in which animals/organisms with the same characteristics are included under them. Apart from the primary distinguishing features of the Animal Kingdom (Eukaryotic, Multicellular, without a cell wall and heterotrophic); each phylum has organisms that have common characteristics. In the classification of animals chart, they move from the simplest to the most complex.
The different phyla in the classification of animals are as follows:
Phylum Porifera
Phylum Coelenterata
Phylum Platyhelminthes
Phylum Nematoda
Phylum Annelida
Phylum Arthropoda
Phylum Mollusca
Phylum Echinodermata
Phylum Protochordata
Phylum Vertebrata
Let us now look at some important features of each Phylum.
Phylum Porifera
These are the simplest multicellular animals, found mainly in marine habitats. These organisms have pores all over the body. They have a canal system that helps in circulating water and food particles and oxygen. The body design shows minimal differentiation and division of tissues. Commonly called as Sponges, some of the examples are Spongilla, Sycon etc.
Phylum Coelenterata
These organisms show more body differentiation. They live in water. The body has a sac-like cavity, with a single opening for ingestion an egestion. These animals have two germ layers and hence are called diploblastic. You can see these animals living solitarily or n colonies. Examples include Jellyfish, Sea Anemone, and Hydra.Phylum Platyhelminthes
These are commonly called flatworms. Their bodies are flattened dorsoventrally. They are the first triploblastic animals, with three germ layers. The body is also bilaterally symmetrical, with both the left and right halves of the body having the same design. Flatworms can be either parasitic or free living. A few examples are Planaria, Liver Fluke, and Tapeworm.
Phylum Nematoda
The bilateral symmetry and triploblastic nature continue in these animals. The body, however, is more cylindrical and not flattened. The body cavity is not a true coelom. And hence it is called a pseudo coelom. Tissues are present, but organs are absent. These organisms show a complete alimentary canal which is straight. Most of these organisms belonging to this phylum are parasitic worms, which cause diseases. Examples are Ascaris, Wucheria.
Phylum Annelida
Annelids are found in different habitats, such as land, fresh water, and even marine mater. They have a bilaterally symmetrical body with three germ layers (Triploblastic). A distinguishing feature here is that they have a true body cavity. The body is also segmented with some organ differentiation seen. Examples are Earthworms, Leeches.
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