Exoskeleton

Imagine you are a little blue starfish. There are many dangers throughout the ocean in which you live. To prevent being harmed, a starfish has a tough outer covering called an exoskeleton. An exoskeleton replaces an internal skeleton. Not just starfish have an exoskeleton. Many invertebrates have exoskeletons too. Exoskeletons protect the owner because they can be to hard for a predator like a bird to break. But a spider can break the exoskeleton and suck up the soft parts of the prey. But some invertebrates don't have an exoskeleton. Squids don't meet animals powerful enough to harm them that often so they don't have an exoskeleton. Only invertebrates can have an exoskeleton because vertebrates already have an internal skeleton. What do you think it would be like to have an exoskeleton?

                                             By Tessa Sagner