What substance constitutes the primary material of an insect's exoskeleton?

Answer

Chitin, a tough polysaccharide

The hard external covering of insects is primarily composed of chitin, which is chemically a tough polysaccharide, often layered with proteins to achieve varying degrees of hardness.

What substance constitutes the primary material of an insect's exoskeleton?
insectstructureanatomyBoneinvertebrate