General Introduction to Invertebrates: classification, ecology, anatomy,  physiology, and biological/economic importance of protozoa; porifera; cnidaria; ctenophora; Acoelomates (flatworms); nemartians; Aschelminths (gastrotricha, rotifera, nematoda, acanthocephala and gnathostomulida); Introduction to coelomates: phylogenetic relationships; adaptive features; general morphology; life cycles and distribution; classification; physiology and biological/economic importance of mollusks; Annelids; Trilobites; chelicerates; crustaceans;  arthropods;  and Echinoderms