Title: Animals III - Pseudocoelomates and Protostome Coelomates - Biology 110 Master - Confluence
Headings: Introduction and Goals
Terms
Introduction and Goals
Coelomates and Pseudocoelomates
Pseudocoelomates: The Phylum Nematoda
Coelomates: Protostomes versus Deuterostomes
Protostome Coelomates: The Phylum Mollusca
Mollusk Anatomy
Protostome Coelomates: The Phylum Annelida
Summary

Content: the acoelomates (e.g., flatworms, flukes, and tapeworms), the pseudocoelomates (e.g., roundworms, pinworms, and hookworms), and the coelomates (e.g., snails, clams, octopuses, earthworms, and leeches). Recall, pseudocoelomates differ from coelomates in that their body cavities are not completely lined by mesoderm-derived tissue. Figure. 2 (Click image to enlarge)
Pseudocoelomates: The Phylum Nematoda
Roundworms are pseudocoelomates that belong to the phylum Nematoda. This extremely diverse phylum includes some highly beneficial soil worms, as well as some notorious pests and parasites. The highly pressurized pseudocoelom of these animals can function as a hydrostatic skeleton, which can be useful in drilling through soil or a host's body tissue. Annelids, cnidarians, and flatworms also have hydrostatic skeletons. Figure. 2 (Click image to enlarge)
Giant kidney worms are able to parasitize many mammals, including humans.