Classify the following organisms based on the absence/presence of true coelom (i.e. acoelomate, pseudocoelomate and coelomate)

Spongilla, Sea anemone

Planaria, Liver fluke

Wuchereria, Ascaris

Nereis, Scorpion

Earthworm, Birds

Fishes, Horse

Coelom is the main body cavity in most multi cellular animals and it contains digestive tract and other organs.

Examples- Nereis, Scorpion, Earthworm, Birds, Fishes, Horse

Pseudocoelomate are animals without true coelom.

Examples- Wuchereria, Ascaris

Acoelomate does not possess a body cavity.

Examples- Spongilla, Sea anemone, Planaria, Liver fluke