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The Exoskeleton


  • Exoskeleton is hard outer covering of arthropods made up of mainly chitin.
  • ¬†Which is secreted by epidermal cells and hardens on secretion.
  • It is strengthened by addition of other substances e.g. tannins and proteins to become hard and rigid.
  • On the joints such as those in the legs the exoskeleton is thin and flexible to allow for movement.

Functions of Exoskeleton

  • Provide support.
  • Attachment of muscles for movement.
  • Protection of delicate organs and tissues.
  • Prevention of water loss.