Kingdom Animalia constitutes all animals. Amongst the five kingdoms, the largest kingdom is the animal kingdom. Animals are multicellular eukaryotes. However, like plants, they do not possess chlorophyll or a cell wall. Therefore, members of the animal kingdom exhibit a heterotrophic mode of nutrition. Kingdom Animalia has been classified into ten different subphyla based on their body design or differentiation.

Defination: Kingdom Animalia is a taxonomic kingdom of living and extinct animals. Members of this kingdom are characterized by being eukaryotic, multicellular, heterotrophic, lacking a cell wall, and mostly are motile.

Different phylum of the Kingdom Animalia

• Porifera: Porifera means organisms with holes. They are commonly known as Sponges. 
• Coelenterata (Cnidaria): The term Coelenteratais derived from the Greek word “kilos” which suggests hollow-bellied.
• Platyhelminthes: Platyhelminthes are commonly known as flatworms. 
• Nematoda: Phylum Nematoda consists of nematodes or roundworms. 
• Annelida: Annelids are commonly referred to as segmented or ringed worms. 
• Arthropoda: Arthropod means jointed legs. Animals that have jointed appendages belong to the present phylum. This is the most important phylum within the Animalia.
• Mollusca: Phylum Mollusca consists of an outsized group of animals. 
• Echinodermata: The term Echinodermata springs from the Greek words, ‘echinos’ meaning hedgehog and derma meaning skin. Thus, echinoderms are spiny-skinned animals.
• Hemichordata: Soft and fragile body divided into a proboscis.
• Chordata: Body bilaterally symmetrical, with an organ-system organisation level and are triploblastic. They possess a notochord and a nerve cord. The circulatory system is closed type.

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By Team Learning Mantras