Biology deals with many kinds of worms. What are the main differences among the three phyla of worms? 17. segmented worms like tape worms, and Nematodes, which are roundworms like . Three different phyla comprise the group known as Helminths. Note that … Second, they have bilateral symmetry. MERGE CANCEL. ATP-Man. Which of the ... One of the criteria used to group animals into Kingdoms and Phyla is the presence or absence of a body cavity (coelom). Biology deals with many kinds of worms. all of the above: 20 . Accordingly, an earthworm is a round and cylindrical shaped worm, which survives under ground in the soil. Platyhelminthes, Annelida, Nematoda. SAVE CANCEL. Most flatworms are parasites that obtain their food from a host animal. Marine worms are found in several different phyla, including the Platyhelminthes, Nematoda, Annelida (segmented worms), Chaetognatha, Hemichordata, and Phoronida. Sometimes a parasite will kill its host, but usually the host survives. 1 Answer. These are flat, un-segmented, worm-like creatures with soft and bilaterally symmetrical body. Title: Bell Ringer 02/04 Author: End User Last modified by: mark weese Created Date: 2/3/2010 8:57:08 PM Document presentation format: On-screen Show (4:3) – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow.com - id: 7238a2-OWYzN In a bilaterally symmetrical animal there is a right side and a left side, a fore end and a hind end, a dorsal or back surface and a ventral or front surface. include leeches, earthworms, and polychaete worms : have characteristically long bodies with both internal and external segmentation : use their coeloms as hydrostatic skeletons : have a mouth that is separate from the anus. They are classified as acoleomates meaning they have no true body cavity ( coelom ). What is the function of a coelom? Nematodes or roundworms are a type of invertebrate, animals without . Phyla of protists One way to classify the protists would be to extend the three-part division of the higher kingdoms downward, with the three divisions of the protists becoming phyla. Worms usually lack appendages; polychaete annelids are a conspicuous exception. have characteristically long bodies with segmentation . Which choice includes three different phyla of "worms"? The first one that we have already discussed is the separation of muscles from guts in the nematodes and annelids. Where exactly is the coelom in an animal? “Annelid.” So the key to the question was that your worm is segmented. The mentioned worms possess different characteristics and accordingly belong to different types of phyla. a doughnut. Phylum Platyhelminthes (flatworms): 1. Relevance. already exists as an alternate of this question. "Worm" is a rather vague term that is typically used to describe three different phyla: Anellida (segmented worms), Nematoda (round worms), and Platyhelminthes (flatworms). 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