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- Animals are also bilaterally symmetrical and triploblastic.
- They exhibit organ system level organization.
- Their body contains haemoglobin , which gives them a red colour.
- Most of the Annelids are hermaphrodite, i.e., male and female organs are present in the same body.
- These animals are found in a variety of habitats– fresh water, marine water as well as land.
For Example: Earthworms, leeches, Nereis
