* all members of animalia are multicellular and they exibit different level of organisation.
*cellular level-in sponges the cell are arranged in loose aggeregation.
tissue level- in coelentrata the cell arrangement are more complex. here, the cell performing the same function are arranged into tissue.
organ level-in platyhelminthes the tissue are grouped together to form organs. each organ specialised for a particular function.
organ system level-in animals like annelida,arthropods,mollusca,echinodermata and chordates,organ are associated to form funtion system. each system concern with a specific physiological function.this is called organ system level.
*in organ system level, the organism are classified on various basis like open and close circulatory system, complete and incomplete digestive system etc.
*cellular level-in sponges the cell are arranged in loose aggeregation.
tissue level- in coelentrata the cell arrangement are more complex. here, the cell performing the same function are arranged into tissue.
organ level-in platyhelminthes the tissue are grouped together to form organs. each organ specialised for a particular function.
organ system level-in animals like annelida,arthropods,mollusca,echinodermata and chordates,organ are associated to form funtion system. each system concern with a specific physiological function.this is called organ system level.
*in organ system level, the organism are classified on various basis like open and close circulatory system, complete and incomplete digestive system etc.
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