Invertebrate Zoology


  • Introduction to Animal Diversity
  • What is an Animal?
  • Origins of Animal Diversity
  • Animals are Characterized by Body Plans
  • Animal Phylogenetic Tree
  • Invertebrates - animals without a backbone
  • Phylum Porifera - sponges
  • Eumetazoa - the animals with tissues, including all animals besides sponges
  • Bilateria - the bilaterally symmetrical animals