noun ダウンロード 🔗共有 外骨格 A hard outer structure that provides both structure and protection to creatures such as insects and Crustacea. Examples : "The crab's exoskeleton protects it from predators. " カニの外骨格は捕食者からそれを守ります。 animal biology organism structure insect anatomy AIとチャット語彙ゲーム読解練習