GENERAL

• WHAT DO INSECTS HAVE?

  exoskeleton
• WHAT IS AN EXOSKELETON MADE UP OF?

  hard, fibrous material and a lipid layer
• WHAT DOES THE HARD, FIBROUS MATERIAL PROVIDE IN THE EXOSKELETON?

  protection
• WHAT DOES THE LIPID LAYER DO IN THE EXOSKELETON?

  prevent water loss
• WHAT DO INSECTS NOT HAVE?

  lungs
• WHAT DO INSECTS HAVE INSTEAD OF LUNGS?

  tracheal system