PHYLUM ECHINODERMATA The Greek terms "echinos," which means spiny, and &quo…
PHYLUM ANNELIDA The Latin word "annellus," which means small ring, is the s…
PHYLUM MOLLUSCA The Latin word "molluscus," which meaning soft, is where th…
PHYLUM NEMATODA The Greek terms "nema," which means thread, and "odes,…