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== 3. How do the special structures and habits of insects fit them so admirably for life? ==
Insects possess segmented bodies supported by an exoskeleton, a hard outer covering made mostly of chitin. The segments of the body are organized into three distinctive but interconnected units; a head, a thorax, and an abdomen. The head supports a pair of sensory antennae, a pair of compound eyes, one to three simple eyes and three sets of variously modified appendages that form the mouthparts. The thorax has six segmented legs and two or four wings (if present in the species). The abdomen has most of the digestive, respiratory, excretory and reproductive internal structures.

Translations:Adventist Youth Honors Answer Book/Nature/Insects - Advanced/4/en - Revision history

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