Why does an arthropod waterproof?

Answer 1

All arthropods have an external skeleton- an exoskeleton. Some exoskeletons are hard, like that of a lobster. It is made out of chitin. Some exoskeletons are leathery, like that of a caterpillar. Both types are waterproof. The exoskeleton keeps the animal from drying out. This characteristic gave arthropods the ability to live on land.

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Answer 2

Arthropods have a waxy cuticle covering their exoskeleton that helps to prevent water loss and protect them from the environment. This waterproofing is important for their survival, as it helps to maintain their internal hydration levels and provides a barrier against harmful substances.