Differences between annelids and arthropods

Annelida:

Phylum Annelida is a very broad phylum belonging to the kingdom Animalia. The Annelids are found in aquatic as well as terrestrial environments. These are bilaterally symmetrical invertebrate organisms.

  • The Annelids are coelomate and triploblastic.
  • They exhibit organ system level organization.
  • Their body is segmented.
  • They respire through their body surface.
  • Nephridia are the excretory organs.
  • They have a well-developed circulatory and digestive system.
  • Example Earthworms, and leeches

Arthropoda:

Arthropoda is the largest phylum of all living organisms and having members with a particular exoskeleton and segmented bodies. Arthropoda is the largest phylum with about nine lakh species.

  • The body is triploblastic, segmented, and bilaterally symmetrical.
  • They exhibit the organ system level of organization.
  • The body is divided into the head, thorax, and abdomen.
  • Their body has jointed appendages that help in locomotion.
  • The coelomic cavity is filled with blood.
  • They have an open circulatory system.
  • Example: Prawn, cockroach

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