All Class Clips content is available to watch on mobile, tablet and desktop devices on our new Knowledge & Learning BETA website.
The skeletons of some animals - invertebrates - are on the outside of their bodies. The exoskeleton protects the animal like a suit of armour. This type of skeleton does not grow with the animal so it must produce a new one when it grows, rather like a new set of clothes. A bronze bug has grown out of its skeleton so it wriggles out of the old one and waits for its new skeleton to harden in the sun.
This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.