Does Annelids Have Cephalization?

Annelids have a nervous system made of two ventral cords and one relatively large nervous cell concentration at its anterior portion, which resembles a primitive brain. ... Therefore, cephalization in annelids is greater than in nematodes or in flatworms

Does Mollusca have cephalization?

Mollusks represent another group in which cephalization has been lost and regained. ... However, as with the echinoderms, certain mollusks regained cephalization. In particular, the appropriately named cephalopods (the group that includes the squid and octopus) are characterized by an advanced degree of cephalization.

Is annelida bilateral?

Annelids display bilateral symmetry and are worm-like in overall morphology. Annelids have a segmented body plan wherein the internal and external morphological features are repeated in each body segment.