Our worms are composting worms called red wigglers, or redworms (Eisenia fetida). These red wigglers are a different species of earthworm from the ones that you might find in your backyard. Backyard …

Earthworms are invertebrates. That is, they do not have a backbone. Insects, sea stars, spiders, jellyfish, and millipedes are other examples of invertebrate animals. Study the illustration of an …

Incisions for Dissection Lay the worm dorsal side up. Pin the cranial and caudal ends.

• In Worm Explorations, students apply the Crosscutting Concept Structure and Function while thinking about how certain structures or behaviors work and help a worm survive.

Draw a large picture of a worm on a piece of paper. Label the anterior and posterior (front and back ends), the segments, the clitellum (the band near the front of the worm) and the mouth.

Large worms are made up of hundreds of segments. Each segment has tiny hair-like bristles called setae. These hairs cling to the walls of a worm's burrow and help the worm move. know as its tail …

Mating worms put their bodies together, and sperm passes from one worm to the sperm storage sac of the other worm. After mating, a mucus ring is formed by the clitellum on each worm.