What are nematodes?
Nematodes are described as a tube within a tube as they have a transparent body shaped like a cylindrical worm with a digestive system running through it from mouth to the anus like a tube.
They do not have a respiratory or circulatory system but have reproductive system.

Nematodes are found in all places on earth even at the polar regions.They are the most abundant organisms on earth.They are also found as parasites in plants and animals.
 They have a snake like sinuous movement and feed on bacteria algae fungi diatoms.

Reference: Nematodes by D.A.Neher

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