Which phylum has a reduced coelomic cavity?

Phylum Mollusca has a reduced coelomic cavity.

Phylum Mollusca

Mollusca is one of the most diverse groups of animals on the planet, with at least 50,000 living species. Phylum Mollusca is the second-largest phylum. They possess osphradia to test the chemical nature of water. Some characteristic features are

  • They are bilaterally symmetrical.
  • The body is soft and unsegmented.
  • They have tissue-system grade of body organization
  • Sense organs consist of eyes, statocysts, and receptors for touch, smell, and taste.
  • The head comprises tentacles and compound eyes.
  • They have a well-developed digestive system, the radula is the rasping organ for feeding.
  • They have a pair of metanephridia that helps in excretion.

 

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