ANIMALIA PART 1
ANTALA LIA PORIFERA COELENTERATA PLATYH ELMDNTHES NE M ATODA ANNELIDA ARTHROPODA ECHINODERMATA PROTOCHORDATA VERTEBRA TA
PORIFERA The organisms belonging to this group have holes. The animals of this group are non- motile and are attached to some rigid support. The organisms belonging to this group have pores throughout their body They have a canal system circulates the water throughout the body of these organisms to transport the food and oxygen. These organisms are covered with a hard external layer or skeleton Examples of animals belonging to this group are Euplectelea, Sycon, Spongilla. Sycon Euplectelea
Coelenterata (cnidaria) * The animals living in water belong to this group. The organisms belonging to this group possesses more body design differentiation They also have cavity in their body. o The body of these organisms has 2 layers of cells. o One type of layer makes up cells on the outside of the body o The second type of layer composes the inner lining of the body. The organisms of this group live either in colonies (corals) or have a Sea anemone solitary like-span (Hydra). o Examples of animals belonging to this group are Jellyfish and sea anemones
PLATHYHELMINTHES * The organisms belonging to this group are complexly designed. The body of these organisms has bilaterally symmetrical shape This means that the design of the left and the right halves of the body are alike. These organisms have three layers of cells that makes up differentiated tissues due to which such animals are called triploblastic. These organisms have no true internal body cavity or coelom.
The body of these organisms is flattened dorsiventrally which means from top to bottom due to which these animals are also called flatworms. * These organisms are either freely existing or parasitic. Examples of animals belonging to this group are planarians, or parasitic animals like liverflukes. * Fig. Planaria (left) and Liverflukes (right)
NEMATODA The bodies of the organisms belonging to this group are bilaterally symmetrical and triploblastic. Female The body of these organisms is cylindrical. These organisms have tissues but no real organs e They have body cavity or a pseudocoelom in their body. Examples of animals belonging to this group are Ascaris, Wuchereria. Ascaris Wuchereria
ANNELIDA The organisms belonging to this group are bilaterally symmetrical and triploblastic. true organs are enveloped within the body structure. with the segments lined up one after These organisms have a true body cavity so that the The differentiation occurs in a segmental fashion, the other from head to tail. An organism of this group lives in variety of habitat:s Earthworm Leech like fresh water, marine water and land. o Examples of organisms belonging to this group are Earthworms and leeches are familiar examples
ARTHROPODA This is the largest group of animals The bodies of the organisms belonging to this group are bilaterally symmetrical and segmented. These organisms have an open circulatory system. Therefore the blood does not flow in a well-defined blood vessel. The coelomic cavity of these organisms is blood-filled. AranealSpider) These organisms have jointed legs. Palaemon Praun) Examples of organisms belonging to this group are prawns, Palamnaeus Scorpion butterflies, houseflies, spiders, scorpions and crabs.
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