Exoskeleton
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Example:
Imagine trying to carry all your groceries from the car to the kitchen without dropping anything. Just like how a sturdy grocery bag prevents your items from spilling out, an exoskeleton acts as a protective shield for animals like spiders, ensuring everything inside stays safe and intact. The grocery bag serves as an outer layer that holds and protects its contents, much like an exoskeleton provides structure and defense for the animal's body.

Practice Version

Exoskeleton: The hard outer covering that protects some animals, like spiders. Exoskeleton. An exoskeleton is a protective shell on the outside of an animals body.