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Do Flies Have Bones?

Published in Insect Anatomy 1 min read

No, flies do not have bones.

Instead of an internal skeleton like humans (an endoskeleton), flies have an external skeleton called an exoskeleton. This exoskeleton is on the outside of their bodies.

Understanding the Fly Exoskeleton

  • What is it made of? The fly's exoskeleton is primarily made of a substance called chitin.
  • Chitin's role: Chitin consists of long chains of glucose molecules. These chains crosslink to provide the rigidity needed for an exoskeleton.
  • How it functions: This exoskeleton provides support and protection for the fly's internal organs. It serves the same function as bones in vertebrates, but in a different way.

Key Differences Between Skeletons

Feature Endoskeleton (like humans) Exoskeleton (like flies)
Location Internal External
Primary Material Bone (calcium phosphate) Chitin
Function Support and protection Support and protection

Examples of Exoskeleton Animals

Many other insects and arthropods also have exoskeletons, such as:

  • Beetles
  • Crabs
  • Spiders