Biology of Insects Their body parts and life
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 – 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!
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