Phylums
Phylums are the 9 groups that further divide the Animal Kingdom into specific creatures. They are Chordata, Cnidaria, Nematoda, Mollusca, Annelida, Platyhelminthes, Porifera, Echinodermata, and Arthropoda. Use the subpages for each phylum to learn more about specific animals within them, and what their cardiovascular systems are like.