Transcription of 4 ANIMAL KINGDOM
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46 BIOLOGYWhen you look around, you will observe different animals with differentstructures and forms. As over a million species of animals have beendescribed till now, the need for classification becomes all the moreimportant. The classification also helps in assigning a systematic positionto newly described OF CLASSIFICATIONI nspite of differences in structure and form of different animals, there arefundamental features common to various individuals in relation to thearrangement of cells, body symmetry, nature of coelom, patterns ofdigestive, circulatory or reproductive systems. These features are usedas the basis of ANIMAL classification and some of them are discussed of OrganisationThough all members of Animalia are multicellular, all of them do notexhibit the same pattern of organisation of cells.
ANIMALANIMAL KINGDOM KINGDOM 47 47 Echinoderms and Chordates, organs have associated to form functional systems, each system concerned with a specific physiological function. This pattern is called organ system
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