This brief article explains how leeches are used in microsurgery to assist in the reattachment of body parts.

Discover fun facts and learn about the medicinal uses of leeches.

Investigate the nervous system by looking at nerve cells in this virtual lab. This lab exercise allows students to experience a virtual dissection of a leech to use electronic equipment to explore the electrical activity of nerve cells....

Discover all you can about various "creepy" critters, including bats, snakes, spiders, cicadas, leeches, ticks, moths, pupas, lampreys and fleas.

This resource gives a brief description of the subclass Hirudinea and the role they have played in medicine.

This section (in table of contents as "Phylum Annelida: Segmented Worms") gives a description of how segmented worms developed certain characteristics as well as it explains the differences in the evolution of different classes of...

Outlines the morphology common to Annelid classes as well as their development.

In this activity, students will investigate leech activity and learn to ask a question about leech behavior that can be investigated. They will design an experiment to answer the question and present their results using a chart.

[Free Registration/Login may be required to access all resource tools.] When you think of worms, you probably picture earthworms. There are actually many types of worms, including flatworms, roundworms, and segmented worms. Earthworms...

Features interesting facts and colorful photos of a variety of invertebrates with a map of the location where they can be found.

Beginning with a list of characteristics, this website from Earth-Life Web welcomes you to the amazing world of annelids. After discussing some of the 9,000 different worms included in this phylum, links to the classes polychaeta,...

[Free Registration/Login may be required to access all resource tools.] Defines and describes red blood cells and white blood cells, and describes the roles of platelets.

Learn about the physical features of segmented worms.