What is the exoskeleton of an insect?
Quick Answer
An insect exoskeleton is a hard outer covering that supports the body and protects internal organs. It is made largely of chitin and must be shed for the insect to grow.
The Full Story
An exoskeleton is the external skeleton that gives insects their shape, support, and protection. It is made mainly of chitin, a tough natural polymer, along with proteins and sometimes waxy layers that help reduce water loss. Because it does not expand much, insects must molt, or shed their old exoskeleton, as they grow. This is why molting is a vulnerable time for insects, since the new exoskeleton is soft at first. The exoskeleton also helps muscle attachment, which is one reason insects can move quickly and efficiently despite their small size.
Key Facts
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