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| 1. |
What is mean by annelida? |
| Answer» Annelidans are the organisms belonging to Phylum Annelida under the category of invertebrates which do not possess vertebral column. These are the organsims which possess characteristics belonging to Phylum Annelida.*Annelidans are aquatic or terrestrial, free living or parasitic in nature.*Annelidans are bilaterally symmetrical, triploblastic, schizocoelomates with segmented body.*They exhibit organ-system level of organization.*Locomotion is by longitudinal muscles, circular muscles and setae.*Closed type of circulatory system is seen.*Nephridia help in osmoregulation and excretion.*Nervous system comprises of nerve ganglia connected to nervecords.*Annelids are both dioeciousand moneciousexhibiting sexual reproduction.*Annelida gets its name from the Latin word “anellus,” which means "little ring". *Annelids are characterised by the presence of a circulatory system.e.g. Earthworm | |