Invertebrate animals commonly called "worms" include annelids (earthworms and marine polychaete or bristle worms), nematodes (roundworms), platyhelminthes (flatworms), marine nemertean worms ("bootlace worms"), marine Chaetognatha (arrow worms), priapulid worms, and insect larvae such as grubs and maggots.
Is Round worm a vertebrate or invertebrate?
Roundworms are invertebrates in Phylum Nematoda. Roundworms have a pseudocoelom and complete digestive system. They are free-living heterotrophs or parasites.
Are flatworms and roundworms invertebrates?
All of them are invertebrates. They all have long, narrow bodies without legs. All worms also have tissues, organs, and organ systems. Worms have bilateral symmetry.
Are nematodes invertebrate or vertebrate?
Nematodes, as members of the phylum Nemata (or Nematoda), are one of the most abundant groups of invertebrates on earth and rival the Arthropoda in biodiversity and species abundance.
Are worms and insects invertebrates?
An invertebrate is a cold-blooded animal with no backbone. Invertebrates can live on land—like insects, spiders, and worms—or in water. Marine invertebrates include crustaceans (such as crabs and lobsters), mollusks (such as squids and clams), and coral.
