Insects

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Insects
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Insects

• Arthropods (segmented body, exoskeleton, and
  jointed appendages)
• Invertebrates

Insects
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Insect Anatomy

• 3 body segments
• Head with a pair of antennae and two eyes
  (usually compound- effective at detecting
  movement)
• Thorax with 6 legs and usually 2 pairs of wings
• Abdomen contains most of the insects organs
• Contains small tubes that allow air to enter the
  body oxygen then travels directly to the cells.

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Insect Anatomy

• Exoskeleton outer covering (made of protein and
  chitin) that supports and protects the body

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Insect Nutrition

• Nutrition various diets for different insects
• Plants/plant products
• Animals (ex. fleas and mosquitoes)
• Decaying animal bodies (ex. Carrion beetles) or
  animal waste (ex. Dung beetle)

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Insect Feeding

• Mouthparts are adapted to type of food
• Butterfly has long tube to drink nectar
• Ants have sharp mouthparts for cutting wood and
  seeds

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Insect Senses

• Good senses (in addition to compound eyes)
• Chemical receptors on mouthparts, antennae, and
  legs to detect taste and smell
• Hairs on legs detect slight movements in air or
  water

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Insect Life Cycles

• Development (life cycle)- metamorphosis- two
  types
• Incomplete (ex. Grasshopper)
• Egg ? nymph ? adult

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Insect Life Cycles

• Complete (ex. Butterfly)
• Egg ? larvae (caterpillar) ? pupa (cocoon) ?
  adult (butterfly)

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Beware the Bot Fly!
Bot flies use mosquitos to carry their eggs to a
host. The mosquitos inject the host with the
eggs. Eggs grow to maturity underneath the skin.
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