Question

Classify the following information organisms on the basis of absence or presence of true coelom (i.e,coelomate,Acoelomate and pseudocoelomate):a) Ascaris b)Herdmania c) Earthworm d)Planaria e)Fishes f) humans

Answer 1

  Coelom is the main body cavity in most multicellular animals and it contains digestive tract and other organs. Organisms in which coelom is absent are Spongilla, sea-anemone, Planaria and liver fluke, hence are, called acoelomates. Pseudocoelomates are animals without true coelom e.g., Wauchreria bancroni. Animals in Vi/hich coelom is present are, Ascaris (Aschelminthes), Nereis (Annelida), earthworm (Annelida), scorpion (Arthropoda), birds (Aves), fishes (Pisces) and horse (Mammalia). 

Answer 2

Ascaris-pseudocoelomate

Earthworm-coelomate

Planaria-acoelomate

Fishes-coelomate

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