Annelids and Arthropods
Annelids and Arthropods
Introduction: Annelids and arthropods are two of the main groups of invertebrate animals.

The arthropods are the largest category of animals on Earth. This group includes the insects, crustaceans (lobsters and crabs), spiders, and millipedes. They have an outer shell called an exoskeleton to protect their bodies (this is why they go "crunch" when you step on them). They also have jointed legs that allow them to maneuver over many different surfaces and also different numbers of antennae.

Directions for this Lesson: Answer the practice questions and then watch this video to learn more about the annelids and the arthropods.
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