Differences between annelid animals and arthropods are as follows:
| Annelids | Arthropods |
| Metameric segmentation is observed where the body is segmented from head to tail | Incomplete metameric segmentation. The body is not completely segmented |
| They are referred to as segmented worms | They are termed as animals with jointed legs |
| The coelom is the true body cavity they possess | Presence of a body cavity containing blood known as ‘haemocoel’ |
| Breathing takes place through the skin | Breathing takes place through the trachea, gill, book lungs etc |
| Most of the annelids are hermaphrodites | They have separate sexes |
| Example – Nereis, Earthworm | Example – Housefly, crab |
