Some are also heterotrophic, in general, they digest their food within the internal chambers which again distinguish them from algae and plants. They are eminent fromĪlgae, plants, and fungus where rigid cell walls are absent. There are millions of species which have been identified, few share similar characteristics while others differ drastically.Īnimals are classified based on their characteristics. They obtain their energy either by feeding on plants or on other animals. Animal Kingdom - Biology, ClassificationĪnimals are eukaryotic, multicellular, species belonging to the Kingdom Animalia. Every animal has its own unique characteristics. To learn more about the phylum and sub-phylum of the animal kingdom with video lessons, visit BYJU’S. Phylum Chordata can be divided into the following sub-phyla: They possess a notochord and a nerve cord. They are bilaterally symmetrical, triploblastic with an organ-system level of classification. The Chordates possess the following characteristics: They have separate sexes and external fertilization is seen. They respire through gills since they are marine. It comprises worm-like marine animals with an organ-system level of organization. The body is soft, fragile, and divided into a proboscis. The characteristics of phylum Hemichordata are as follows: Have hard calcium carbonate skeleton structure.Įxamples of phylum Echinodermata include- Sea urchins, starfish. Thus, echinoderms are spiny-skinned animals. The term Echinodermata is derived from the Greek words,ĭerma meaning skin. Features are:Įxamples of phylum Mollusca include- Snails and octopus. Phylum Mollusca consists of a large group of animals. Have an open circulatory system, but do not have differentiated blood vessels.Įxamples of phylum Arthropoda include – Spiders, butterflies, and mosquitoes. Have well-differentiated organ and organ system. Have jointed appendages, exoskeleton and a segmented body. This is the largest phylum in the animal kingdom. Animals which have jointed appendages belong to this phylum. The body is differentiated into head and tail.Įxamples of phylum Annelida include – Earthworm, Leech.Īrthropod means jointed legs. Parasitic and causes diseases such as elephantiasis, ascariasis.Įxamples of phylum Nematoda include – Ascaris, Wuchereria.Īnnelids are commonly known as segmented or ringed worms. Their features are:īilaterally symmetrical and triploblastic. Phylum Nematoda consists of nematodes or roundworms.

Tissues are differentiated from three layers of cells and are triploblastic.ĭo not have a true internal cavity or coelom.Įither free-living (Planaria) or parasitic (liver flukes).Įxamples of phylum Platyhelminthes include -Tapeworm, Planaria. Their features are:Ĭomplex and have differentiated body structure. Platyhelminthes are commonly known as flatworms. Live in colonies (corals) as well as solitary (Sea anemone).Įxamples of phylum Coelenterata include – Hydra, Jellyfish. The body is made of two layers of cells: inner and outer linings.

The body is differentiated into two ends. The term Coelenteratais derived from the Greek word “kilos” which means hollow-bellied. Not differentiated into head and tail do not have a well-developed organ or organ system.Įxamples of phylum Porifera include- Spongilla, Sycon. Pores on the bodies create a canal system which helps in the circulation of substances. Non-motile, multicellular organisms with a hard outer skeleton. The different phylum of the animal kingdom are as follows: Kingdom Animalia has been classified into ten different subphyla based on their body design or differentiation. Therefore, members of the animal kingdom exhibit a heterotrophic mode of nutrition. However, like plants, they do not possess chlorophyll or a cell wall. Amongst the five kingdoms, the largest kingdom is the animal kingdom. Kingdom Animalia constitutes all animals. Let us learn about the animal kingdom, i.e., Kingdom Animalia.

The five kingdoms proposed by Whittaker are Monera, Protista, Fungi, Plantae and Animalia. He classified organisms based on cell structure, mode and source of nutrition and body design. Whittaker organized organisms into five kingdoms. Kingdom Animalia (Phylum, Subphylum) - An Overview

Sekiro dried snake escape