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

2. “insecticum”
Latin word meaning “cut into”

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

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

5. The Thorax
Used for movement
Wings
Two sets of legs

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

7. More Insect Parts

8. Let’s Review

9. 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

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

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

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

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

14. 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

15. Review: Insect Parts

16. Review: Life Cycles

17. GREAT JOB EVERYONE!