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Explore the biology and natural history of segmented worms. Learn how earthworms improve soil and why they come to the surface on rainy days. Discover features annelids share with all animals as well as distinctive characteristics found only in phylum Annelida. Annelids interactive overview of the three largest annelid classes teaches students the importance of oligochaetes, the different body plans of polychaetes, and the actual medical uses of leeches.

Topics include: Animal Characteristics; The Importance of Annelid Segments, Symmetry, and Development in Classifying Annelids; Annelid Evolution; Annelid Anatomy and Organ Systems Involved with the Integument, Support, Movement, Digestion, Excretion, Circulation, Respiration, and Sensation; Reproduction, and more.

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