Introduction: Animals world is actually the synoname of animal kingdom which includes the different types of animals present in nature. Animal world consists of the very large group in which only those living things which show the distinguishing features of animals are included. They are different from other living groups which are included in plant kingdom. Basically, animals possesss the important characters which makes them to be animals and not the plants. Characters like capacity of movement, having the particular types of locomotary organs, power to grow continuously and gradually, property of showing irritablity i.e. showing response to the particular types of environmental stimulus like heat, cold,temperature,light touch, chemicals etc. Although different from the plants in the different characters,animals also show the similarity with the plants as the plants are also the living things of nature. Similarity in having the unit structure in their body called cell, being able to respire, life's vital processes like metabolism, having the vital fluid called protoplasm in the cell, capacity to reproduce for the continuity of race are the the characters which make the animals similar to plants.: Animals world consists of animals which are of different types. They are differentiated into different types on the different ways and different basis. For example,
Invertebrates and vertebrates on the basis of presence or absence of vertebral column. Those animals which have aell-developed vertebral column in their body are said to be vertebrates. Those animals which have no vertebral column or backbone are said to be invertebrates. Animals are again diffrentiated into two groups on the basis of presence or absence of jaw. Those animals which have jaw are grouped into "Gnathostomata" and those animals which have no jays are grouped into "agnatha". Animals are further classified into the different groups. some groups are larger and some are smaller. Very large group of animals is known as phylum , and the smaller group is called subphylum. Subphylum is further divided into classes and subclasses which are further divided into order and suborders. Suborders are further divided into genus and genus into species. In this way it is very important to keep a particular animal in its part icular systematic position by keeping it in the order of its phylum,subphylum, class, subclass, order, suborder, genus and species. Keeping the animal in its systematic position or classifying the particular animal is the branch of biology which is called "taxonomy".
Classifification: Animals are of various size and various types. Animals like invertebrates which have no vertebral column are classified into the following phyla i.e. the large group which are as follows:
Phylum1 Protozoa: This is the first invertebrate phylum which consists of the first appeared animals of animal world. These are unicellular or made up of only one cell, with the particular types of locomotary organelles and some of which may not hve such organelles. Animals like amoeba, paramecium, euglena, verticella, malaria parasites like plasmodium etc are included inthis phylum.
Phylum Porifera: This phylum includes the multicellular animals whcih living in aquatic habitat. They are more or less plant like with no locomotary organs. They remain fixed to the substratum.They are aquatic in habitat.
Phylum Coelenterata : This is the third invertebrate phylum which includes those animals which flattened body. Most of them live as parasites and live inside the body of the other animals called hosts.
Invertebrates and vertebrates on the basis of presence or absence of vertebral column. Those animals which have aell-developed vertebral column in their body are said to be vertebrates. Those animals which have no vertebral column or backbone are said to be invertebrates. Animals are again diffrentiated into two groups on the basis of presence or absence of jaw. Those animals which have jaw are grouped into "Gnathostomata" and those animals which have no jays are grouped into "agnatha". Animals are further classified into the different groups. some groups are larger and some are smaller. Very large group of animals is known as phylum , and the smaller group is called subphylum. Subphylum is further divided into classes and subclasses which are further divided into order and suborders. Suborders are further divided into genus and genus into species. In this way it is very important to keep a particular animal in its part icular systematic position by keeping it in the order of its phylum,subphylum, class, subclass, order, suborder, genus and species. Keeping the animal in its systematic position or classifying the particular animal is the branch of biology which is called "taxonomy".
Classifification: Animals are of various size and various types. Animals like invertebrates which have no vertebral column are classified into the following phyla i.e. the large group which are as follows:
Phylum1 Protozoa: This is the first invertebrate phylum which consists of the first appeared animals of animal world. These are unicellular or made up of only one cell, with the particular types of locomotary organelles and some of which may not hve such organelles. Animals like amoeba, paramecium, euglena, verticella, malaria parasites like plasmodium etc are included inthis phylum.
Phylum Porifera: This phylum includes the multicellular animals whcih living in aquatic habitat. They are more or less plant like with no locomotary organs. They remain fixed to the substratum.They are aquatic in habitat.
Phylum Coelenterata : This is the third invertebrate phylum which includes those animals which flattened body. Most of them live as parasites and live inside the body of the other animals called hosts.
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