FRIDAY 3/18/16 Learning Goal: Identify the main characteristics of insects. Explain how insects are adapted to obtain food. Name the two types of metamorphosis found in insects. Warm up: An insect’s wings and legs are attached to the section of its body called the _____________ Homework: Finish pages 30-32 FRIDAY 3/18/16

Insects Chapter 10 Section 3

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

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

Body Structure: Thorax 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

Body Structure: Abdomen 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

“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

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

Complete Metamorphosis 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

Gradual Metamorphosis 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