What is a vertebrate and invertebrates

Vertebrates /ˈvɜːrtɪbrɪts/ comprise all species of animals within the subphylum Vertebrata /-eɪ/ (chordates with backbones). Vertebrates represent the overwhelming majority of the phylum Chordata, with currently about 69,276 species described.[4] Vertebrates include such groups as the following: jawless fishes jawed vertebrates, which include the cartilaginous fishes (sharks, rays, and ratfish) tetrapods, which include amphibians, reptiles, birds and mammals bony fishes -----------------------------------------+------------------------------------ Invertebrate is a kind of animal that does not have a spinal column or backbone. It is the opposite of vertebrate, that means if an animal is not a vertebrate (fish, reptile, amphibian, bird, or mammal), it is an invertebrate. The main phyla (groups) of invertebrate animals are: Annelida: segmented worms Arthropods: (arachnids, crustaceans, insects, and others); Brachiopods: the lamp-shells. Bryozoa: sea mats or moss animals (sometimes they look like corals) Cnidarians: jellyfish, sea anemones, hydroids. Echinoderms: starfish, sea urchins, sea cucumbers Molluscs: (gastropods, cephalopods, bivalves and others); Nematoda: roundworms Porifera: sponges Platyhelminthes: flatworms Rotifers: tiny "wheel animals", which live in habitats such as pond water. Insects and other arthropods have no bones, but they have a skeleton on the outside of their bodies, called an exoskeleton.