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Question Set: Worms
NGSS Science and Engineering Practices
NGSS Crosscutting Concepts
Table of Contents
  1. How do body structures and functions of a flatworm compare with those of a cnidarian for
    1. sensory responses to the environment?
    2. arrangement of the nervous system?
    3. obtaining food?
    4. movement?
    5. excretion of body wastes?
  2. What is the flatworm’s shape? What type of symmetry does it have?
  3. How does the free-living flatworm move? How does its shape relate to its method of moving? What structures are necessary for this type of movement?
  4. How does the digestive system of a nematode or annelid differ from that of a flatworm? In what ways is the digestive system of an annelid worm more efficient than that a flatworm?
  5. Compare the excretory systems of a flatworm and an annelid worm. How are they similar? How are they different?
  6. What is a coelom? What advantages does an animal with a coelom have over an animal, such as a flatworm, that has no coelom?
  7. Fill in Table 3.4 comparing the body structures of a sea anemone, a flatworm, a nematode, an annelid worm, and a fish. Are flatworms more like cnidarians or annelids? Are annelids more like flatworms or fish? Give evidence that supports your answer.


Table 3.4. Comparison of body structures of five groups of animals
Body Structure Sea Anemone Flatworm Nematode Annelid Worm Fish
Digestive System          
Circulatory System          


Exploring Our Fluid Earth, a product of the Curriculum Research & Development Group (CRDG), College of Education. University of Hawaii, 2011. This document may be freely reproduced and distributed for non-profit educational purposes.