Print this Web Links Activity Log to record your findings. In order to view and print these activities, it is necessary to have Adobe Acrobat Reader. If you do not have this, get the free download now.   Click the Techie Toolbox for tips and help to make the most of your time on the Web. Chapter 30: Mollusks and Segmented Worms Virtual Worm Tour This site will take you on a virtual tour of an earthworm. Follow the instructions on the screen to learn more about earthworm digestion, respiration, excretion, circulation, reproduction, and movement. Worm in Science - Are they Useful? Can you imagine seeing leeches or maggots being used in hospitals to treat injuries? Sounds like a science fiction movie, but it happens more often than you think. Read the information on this page to learn about the history and current practice of using these organisms in medicine. What is the main benefit of using leeches in modern medicine? The Cephalopod Page Access this site for taxonomy, photographs, and information about octopuses, squids, and nautiluses. Follow the links for other cephalopod sites. What is a subclass of extinct cephalopods? Aquatic Resources Division, The Marine Resources Center, Marine Biological Laboratory, Woods Hole, MA Visit this site for photographs and taxonomic information on mollusks. What is a slipper shell? The Compost Resource Page, Earthworm FAQ Answers to commonly asked questions about earthworms. Introduction to the Polychaeta, the bristleworms Follow the link to the site above to learn more about ocean-living segmented worms. What are polychaetes and what feature do all varieties have in common? Have any fossils of polychaetes been found? In Search of Giant Squid Visit this online exhibit that explores the life of the giant squid. How is a squid like a snail?