corals
3 of the water invertebrate groups are the annelids, arthropods and crustacean.
Flatworms, Roundworms, Annelids, Mollusks, and Arthropods
The eight groups are:* Mollusks * Echinoderms * Arthropods * Annelids * Nematodes * Porifera* Platyhelminthes * Coelenterates Or go to:What_are_the_8_groups_of_invertebrates
Circular and Longitudinal muscles.
the 8 groups of invertebrates are the arthropods, poriferans, platyheminthes, coelenterates, nematoeds, mollusks, echinoderms, and annelids
The three largest groups of invertebrates are arthropods, mollusks, and annelids. Arthropods, which include insects, arachnids, and crustaceans, are the most diverse and abundant, with millions of species. Mollusks encompass creatures like snails, clams, and octopuses, known for their soft bodies and often hard shells. Annelids, such as earthworms and leeches, are segmented worms that play crucial roles in soil health and ecosystems.
Protonephridia are primarily associated with the class Turbellaria, which includes free-living flatworms, rather than annelids. However, in the context of annelids, the class Oligochaeta (such as earthworms) and the class Hirudinea (leeches) have a different excretory system involving nephridia, which are more complex than protonephridia. In summary, protonephridia are not characteristic of annelids but rather of certain other invertebrate groups.
Arthropoda. Five groups are- Trilobitomorpha, Chelisrata, Myriapoda, Hexapoda, Crustacea.
annelids
Are annelids vertebrate
Annelids have an anus
Yes, Annelids have bilateral symmetry.