Insects

1. Insects Chapter 10 Section 3

2. Arthropods with three body sections, six legs, one pair of antennae, and usually one or two pairs of wings • Three body sections are the head, thorax, and abdomen Body Structure

3. Insect’s sense organs found in head (eyes/antennae) • Two large compound eyes • Compound eyes contain many lenses,keen at seeing movement Body Sections: Head

4. Insect’s midsection • Where wings and legs are attached • Only invertebrates that can fly • Can travel long distances to find mates, food, and new places to live Body Structure: Thorax

5. Internal organs found in the abdomen • Small holes outside of abdomen allow air, which contains oxygen, to enter the body through tubes Body Structure:Abdomen

6. “If it is living, or if it once was living, some kind of insect will eat it.” • Mouthparts are adapted for a highly specific way of getting food Obtaining Food

7. Begin life as tiny, hard-shelled, fertilized eggs • Either go through… • Complete metamorphosis • Gradual metamorphosis Life Cycle

8. 4 different stages: egg, larva, pupa, adult • Insect begins life as a tiny, hard-shelled fertilized egg • The eggs hatch into larvae (usually look like worms) • Larva will then enter next stage and become a pupa, insect is enclosed in a protective covering • Pupa does not eat/barely moves, but it is NOT resting • When development is complete, adult leaves pupal case Complete Metamorphosis

10. No distinct larval stage • Egg hatches into a stage called a nymph • Nymph: usually looks like the adult insect without wings • Nymph may molt several times before becoming an adult • Grasshoppers, termites, cockroaches, dragonflies Gradual Metamorphosis