7 – Exoskeleton and its Types
Exoskeleton, Types of Skeleton Exoskeleton is external to body consists of epicuticle and procuticle. Rigidity, heaviness and hindrance to growth are disadvantages of exoskeleton. Difference b/w exoskeleton and endoskeleton. Exoskeleton of Molluscs and arthropods are explained. Functions of exoskeleton. Ecdysis and moulting its stages are explained.