Assertion: echinoderm's body | /r/HasProperty | covered by cuticle
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Source sentences:
text: The arthropod body is covered by a cuticle (structurally different from the cuticle of plants but there are some functional similarities), composed primarily of the polysaccharide chitin (the same type of polymer used by fungi, as was mentioned in Tutorial 16, but with a harder character; chitin was also described in Tutorial2, Carbon and Life).