Consist of external organs that protect the body From damage, including the skin, fingernails, and hair
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Answer:
exoskeleton
Explanation:
exoskeleton is the tough outermost covering present in several organisms suchas cockroaches, made of chitin, pectin, lignin etc. In soft bodied molluscs also their is hard shell made of calcium carbonate, calcium pectate. Even some unicellular organisms suchas diatoms also possess two plates made-up of calcium pectate, after their death these shells reach the bottom of the ocean and from diatomaceous earth.
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