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Insects

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Insects range from microscopic arthropods to large insects ... Ecdysis. Osmoregulation. Metabolism. Heart rate. Pheromones control many specialized behaviors ... – PowerPoint PPT presentation

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Title: Insects


1
Insects
  • Diversity, Regulation Locomotion

2
Insect Diversity
  • There are 26 orders and superorders in the class
    Hexapoda
  • Insects range from microscopic arthropods to
    large insects that are over 12 long!
  • They occupy almost every terrestrial environment
    on earth

3
Insect Flight
  • Insects were first to fly
  • Two types
  • Direct (synchronous) flight
  • Muscles contract on down and up beats
  • Indirect (asynchronous) flight
  • Muscles change the shape of the exoskeleton
  • The exoskeleton clicks and moves the wings

4
Other Forms of Insect Locomotion
  • Walking (3 legs on ground)
  • Running (3 or fewer legs on ground)
  • Jumping
  • saltatory legs
  • changing shape of the exoskeleton until it
    catapults the insect

5
Insect Nervous Regulation
  • Johnstons organs hearing
  • Tympanic organs hearing
  • Compound eyes sight
  • Some insects can have chemosensors on feet or
    antennae
  • Some insects use their second ganglia for
    specialized responses (mating, escaping)

6
Insect Chemical Regulation
  • Endocrine system controls
  • Ecdysis
  • Osmoregulation
  • Metabolism
  • Heart rate
  • Pheromones control many specialized behaviors
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