What is the difference between nematodes and annelids ?

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Solution

Nematodes: The organisms belonging to the phylum Nematoda are also known as “roundworms”. They are unsegmented vermiform animals. The epidermis has dorsal and ventral nerve cords.
Annelids: Phylum Annelida is a very broad phylum belonging to the kingdom Animalia. The Annelids are found in aquatic as well as terrestrial environments.
Characteristics Nematodes Annelids
1.Description These are the roundworms belonging to the phylum Nematoda. These are the worms belonging to the phylum Annelida.
2. Body segmentation Unsegmented body Segmented body
3.Coelom Pseudo-coelom, lined with mesoderm on one side and other side with endoderm True coelom, lined entirely by mesoderm
4.Body size Possess small bodies Possess large bodies
5.Body outline Tapered ends Do not have tapered ends.
6.Parapodia Do not possess parapodia. They possess parapodia.
7.Mode of nutrition or survival Nematodes are majorly parasitic. Annelids are not majorly parasitic.
8.Muscular organization Possess longitudinal muscles. Possess circular and longitudinal muscles.

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Characteristics	Nematodes	Annelids
1.Description	These are the roundworms belonging to the phylum Nematoda.	These are the worms belonging to the phylum Annelida.
2. Body segmentation	Unsegmented body	Segmented body
3.Coelom	Pseudo-coelom, lined with mesoderm on one side and other side with endoderm	True coelom, lined entirely by mesoderm
4.Body size	Possess small bodies	Possess large bodies
5.Body outline	Tapered ends	Do not have tapered ends.
6.Parapodia	Do not possess parapodia.	They possess parapodia.
7.Mode of nutrition or survival	Nematodes are majorly parasitic.	Annelids are not majorly parasitic.
8.Muscular organization	Possess longitudinal muscles.	Possess circular and longitudinal muscles.