Original: Role of the exoskeleton Exoskeletons contain rigid and resistant components that fulfil a set of functional roles including protection , excretion , sensing , support , feeding and ( for terrestrial organisms ) acting as a barrier against desiccation .
Simplified: Exoskeletons contain rigid and resistant components that fulfil a set of functional roles including protection , excretion , sensing , support , feeding and ( for terrestrial organisms ) acting as a barrier against dessiccation .