Define segmentation and indicate how the annelids and your body exhibit this phe

Question

Define segmentation and indicate how the annelids and your body exhibit this phenomenon List the roundworm parasites and use the Internet to learn how they gain entry into the body. Describe that process here 18. 9. Wri the phylum and choose the appropriate desecription for each animal (or group of animals) listed in the following table. Phylum ymmetry Level of Animal Sponge Hydra and jellylish Flatworm Rotfer Segmented worm Clam, snail, and octopus Level of Organization Body Cavity Gut None None Crayfish, insect, and spider 20. Define segmentation and indicate how the annelids, arthropods, and your body exhibit this phenomenon. 404 ExERCISE 19

Explanation / Answer

Answer:

17) Define segmentation and indicate how annelids and your body exhibit this phenomenon.

18) List the roundworm parasites and how they gain entry into the body.

19) Write the phylum and choose the appropriate description of each animal.

Animal Phylum Symmetry Level of Organization Body Cavity Gut Sponge Porifera asymmetrical body plans cellular-level organization (different cells perform different functions) Sponges don’t have a true cavity, Spongocoel in center Sponges don’t have a gut Hydra and Jellyfish Cnidaria Radial symmetry Tissue level of organization Gastrovascular Cavity Hollow cavity within body Flatworm Platyhelminthes bilateral symmetry Organ-system acoelomates (having no body cavity) blind gut Rotifer Rotifera bilateral symmetry Organ-system Body cavity is a pseudocoelom. Lack a functional gut Segmented worm Annelida bilateral symmetry Organ-system Well developed body cavity complete gut Clam, Snail and Octopus Mollusca bilaterally symmetrical Organ-system Internal body cavity, mantle cavity complete gut Roundworm Nematoda bilateral symmetry Organ-system pseudocoel complete gut Crayfish, insect, and spider Arthropoda bilateral symmetry Organ-system Eucoelomate body cavity complete gut

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