Presentation on theme: "There are four main kinds of arthropods."— Presentation transcript:
1There are four main kinds of arthropods. An arthropod is an invertebrate with an exoskeleton, a segmented body, and jointed legs.There are four main kinds of arthropods.1. Crustaceans3. Centipedes &Millipedes2. Spiders & ScorpionsTicks & Mites4. Insects
2There are three characteristics that all arthropods have. There are more than 1 million kinds of arthropods on Earth.There are three characteristics that all arthropods have.1. exoskeleton2. segmented body3. jointed legs
3An exoskeleton is a hard, outer covering. All arthropods have anAn exoskeleton is a hard, outer covering.
4Some arthropods grow too big for their exoskeletons. molt.These arthropods willMolting is to leave an exoskeleton and grow a new one.
5More Characteristics of Arthropods Arthropods have segmented bodies.Arthropods have jointed legs.Arthropods have a heart topump blood through their bodies.Arthropods reproduce sexually.
6Crustacean Crustaceans are ... Crabs Lobsters Barnacles Shrimp A crustacean is an arthropod that has a hard, exoskeleton, two pairs of antennae, and a mouth for crunching and grinding.Crustaceans are ...CrabsLobstersBarnaclesShrimp
7special respiratory organs that help some CrustaceansCrustaceans can _____________ certain parts of their body.re-growstone crabA ___________ can re-grow its claws.Most crustaceans live in ____________ and get oxygen from the water through _________.watergillsGills arespecial respiratory organs that help someanimals breathe and get oxygen from the water.
8Insects and their relatives are ARTHROPODS. What is Entomology?The study of insects(and their near relatives).What are insects(and near relatives)?Insects and their relatives areARTHROPODS.
15Class Arachnida Scorpions Scorpionida Daddy Long legs Opiliones 4 Orders - Spiders AraneaeScorpions ScorpionidaDaddy Long legs OpilionesTicks and Mites Arcarina
16Characterisitics of spiders ( Order Araneae ) 6 pairs of appendages4 pairs of walking legs1 pr. of chelicera ( most anteriorhead appendage)1 pr. of pedipalpsno antennaeno segmentationhead-chest fused to form cephalothoraxbreathe with book lungs or tracheapoison glands with fangs ( on the chelicera )
30(many legged arthropods) Classes of Myriapods(many legged arthropods)(all have one pair of antennae, a head region, and trunk with many pairs of legs, use trachea)Diplopoda - millipedesChilopoda - centipedes
31Myriapods Millipede (Diplopoda) Centipede (Chilopoda) [one pair of antennae, head & trunk regions, trunk with many pairs of legs]Millipede (Diplopoda)Two pair of legs per visible segment, attached under body.Centipede (Chilopoda)Pair of fangs under head, one pair legs per visible segment - attached to side of body.No fangs, no eyes, legs attached to side of body.
33Classes of Crustacea Sowbugs or pillbugs Sand fleas Barnacles mostly marine, fresh water, a few terrestrialall have two pair of antennaefive or more pairs of legssegmented abdominal appendageshead & trunk or cephalothorax & abdomen body arrangementhave gillsSowbugs or pillbugsSand fleasBarnaclesCrabs, lobster, shrimp