Their body parts and life cycles Biology of Insects Their body parts and life cycles

“insecticum” Latin word meaning “cut into”

Insects are “cut into” three distinct parts Head Thorax Abdomen

The Head Functions Mouth parts Antennae Eyes Securing food Sensory perception Mouth parts Antennae Eyes

The Thorax Used for movement Wings Two sets of legs

The Abdomen Houses the organs that perform: Respiration Digestion Circulation Reproduction

More Insect Parts

Let’s Review

Now it’s YOUR turn... Label the insect on your handout Head Mouth parts, Antennae and Eyes Thorax Wings and Legs Abdomen Then check it with a neighbor

Insect life cycles Metamorphosis: the change from one form to another 2 types Incomplete Complete

Incomplete Metamorphosis Changes gradually Beetles, dragonflies, grasshoppers, crickets The stages: Egg Nymphs Molting Adult

Complete Metamorphosis Distinct stages that bear no resemblance to each other Butterflies and moths The stages Egg Larva Pupa Adult

So the main difference is... INCOMPLETE METAMORPHOSIS “gradual, similar” COMPLETE METAMORPHOSIS “rapid, different”

Now it’s YOUR turn... Label the types & stages of metamorphosis Incomplete: egg, nymph(s), adult Complete: Egg, larva(e), pupa, adult Check your answers with a neighbor

Review: Insect Parts

Review: Life Cycles

GREAT JOB EVERYONE!