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  • Which of the following have a complete digestive system?Option: 1 Echinoderms and AschelminthesOption:

Which of the following have a complete digestive system?

Option: 1

Echinoderms and Aschelminthes


Option: 2

Echinoderms and Molluscs


Option: 3

Echinoderm and Arthropod


Option: 4

All of these


Answers (1)

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Digestion in Echinoderms:

  • They have a complete digestive system with mouth located on the ventral side and anus on the dorsal side. 

Nervous System in Echinoderms:

  • They have a simple nervous system with a central nerve ring and five radial rings. There is no grouping of nerves, so brain-like structure is absent. 

Reproduction and Development in Echinoderms:

  • They are dioecious animals. Sexes are separate.
  • Usually external fertilization takes place.
  • Development is indirect with the formation of free-swimming larvae.
  • They also show high capacity of regeneration.
     

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Echinoderms, molluscs and arthropods have a complete digestive system.

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vishal kumar

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