Gills and a well developed nervous system
legs.
Closed hydrovascular for echinoderms, open haemolymphatic for arthropods. ^^
Sponges, Cnidarians, Mollusks, and Echinoderms are not Arthropods.
A. Arthropods
The types of organisms which have segmented bodies include annelids, arthropods, echinoderms, and chordates. Some of the most obvious examples of segmentation are found in insects which belong to the arthropods.
No, echinoderms do not have bilateral symmetry. They have radial symmetry, which means their body parts are arranged around a central axis.
sponges+mollusks+arthropods+worms+octopods+echinoderms
Gills and a well developed nervous system
Lobsters are neither echinoderms nor mollusks like clams. They are also not arachnids. Instead, they are crustaceans, a subsection of arthropods.
Appendages.............in multiples of........numbers........and clouds
Echinoderms are mostly marine while arthropods dwell in almost all habitats.
No, a caterpillar is an Arthropod. There are over a million types of anthropoids on earth. Here are three things all arthropods have 1. Chitonous 2. Exoskeleton segmented body 3. Jointed appendages