Standard:S5L1a. Demonstrate how animals are sorted into groups (vertebrate and invertebrate) andhow vertebrates are sorted into groups(fish, amphibian, reptile, bird, and mammal).Main idea: The differences between animalsdetermine how they are classified.
Animal Species Over 96% of 1% 1% all animals 1% 4%4% today are5% Arthopods invertebrates! Mollusks Worms Vertebrates Sponges Cnidarians 84% Echinoderms
InvertebratesAnimals without a backbone are invertebrates.Over 96% of the animal species are invertebrates.Review:Symmetry- a matching pattern of body shape.Radial symmetry – body parts arranged equallyaround a middle pointBilateral symmetry – bodies with two similarhalves
Bilateral SymmetryRadial Symmetry
Cnidarians – The Stinging Animals • Jellyfish and coral • Simple digestive systems with mouths •Radial symmetry
Echinoderms• Starfish, seaurchins, and seacucumbers•Means “spiny skin”• Sucker-like parts tocatch prey
Arthropods• lobsters, crabs, spiders, and insects• largest group of animals• jointed parts surrounded by anexoskeleton (hard covering)•Bilateral symmetry
Sponges• Lacktissues, organsand true bodysymmetry•Most live inoceans, a few livein freshwater•Filter bits of foodfrom water thatpasses throughthem
Worms• Includesflatworms, roundworms &segmentedWorms.•Bilateral symmetry•Heads and simple organsystems•Some are parasites – they liveand feed off the body of a host
Let’s ReviewInvertebrates- Be ready to take the quiz!
Let’s review!!Vertebrates – animals with a backboneCold-blooded – the temperature of the animaldepends on the temperature outside theirbodiesWarm-blooded – the animal’s body maintainsits own heatLet’s learn about Vertebrates!!
Cold-blooded Vertebrates- Ectotherms• Reptiles• Amphibians• FishThe body temperature of a cold-blooded (ectotherms) animal dependson the temperature outside theirbodies.
Fish• Most have a bonyskeleton (sharks havecartilage skeleton)•Gills to breathe inwater•Most cold-blooded•Scales•Swim bladder
Amphibians•frogs, toads, salamanders, newts included• need to live close to water• some have lungs• some breathe through skin• need water to reproduce• salamanders & newts •have tails •most live near water – some in deserts though
Warm-blooded Vertebrates - Endotherms•Birds•MammalsMaintain constant internal bodytemperatures – body cells produce heat
Birds• live almost anywhere inworld• feathers• beaks instead of teeth• some eat mammals, fishand other birds• some eat insects• some eat plants/seeds
Mammals Humans are mammals Most complex organs & nervous system large brain complex behaviors hair – even whales have whiskers feed milk to young most have teeth can move place to place
Let’s reviewvertebrates – be ready to take the quiz!