kingdom animalia phylum chordata most are classified as vertebrates – organisms with a backbone
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Kingdom Animalia
Phylum Chordata
• Most are classified as VERTEBRATES – organisms with
a backbone
Supraclass PiscesFish
Ectothermic - cold-bloodedGills for gas exchangeWater habitatScavengers, carnivores, predators, parasitesSwim with finsExternal fertilization (bony fish)Separate sexesBilateral symmetry
Class AgnathaJawless Fish – lampreys & hagfish
Lampreys: live in salt and freshwater Parasitic- round mouth lined with teeth Slimy skin, no scales
Hagfish: scavengers Use 6 short tentacles
surrounding the mouth to find its food
Blind
Class ChondrichthyesCartilaginous Fish – shark, ray, & skates
Sharkspaired finsstreamlined bodiespredators - rely on sense of smell and movement
Rays and Skates
flat, wide bodies with long thin tails for life on ocean bottom
large pectoral fins (look like wings)
Class OsteichthyesBony Fish – ex. Perch, trout, bass
scales covering the body
skeleton made of bone
swim with the aid of fins
have swim bladder that works like a balloon
Class Amphibia –frogs, toads, salamanders, & newts
Characteristics“Double Life” -lives part of its life in water and part on land
ectothermic
no scales or claws
Have thin, moist skin
larvae are herbivores, adults carnivores
larva have tails to move in water
external fertilization with no parental care
lay eggs without shells in water
Body Plan Bilateral symmetry 3 chambered heart Larvae breathe through gills; adults breathe
through lungs Breathe through thin, moist skin (produces
mucus) Changes from larva to adult through
the process of metamorphosis
Class Reptilia –snakes, lizards, turtles, alligators
CharacteristicsFirst vertebrate to live and reproduce entirely on land
Ectothermic
Carnivores or omnivores
Have scales and claws
Internal fertilization with no parental care
Lay amniotic eggs with leathery shells
Body Plan Bilateral symmetry 3 chambered heart Breathe through lungs Dry, scaly skin prevents water loss
Class AvesBirds
CharacteristicsEndothermic
Has feathers and two legs covered with scales
Front limbs are wings
Beaks, claws and good vision help birds get food
Carnivores, herbivores, insectivores
Internal fertilization
Amniotic eggs with hard outer shell
Body Plan Wings
4-chambered heart Lungs Hollow bones Strong breast muscles
Class Mammalia
CharacteristicsHair or fur at some stage of development
Give birth to live young (except Monotremes)
Endotherms
Herbivores, carnivores and omnivores
Walk, swim, or fly
Sexual (egg and sperm) with separate sexes
Internal fertilization
Body Plan Internal skeleton Complex organ systems Mammary glands (for milk) Four-chambered heart Lungs
Monotremes (lay eggs) Duckbill platypus
Marsupials (live young develop in a pouch)
Kangaroos, koalas
Placental (young develops internally)
12 Orders with examples such as Primates Bats Whales & dolphins Walrus & seals Hoofed livestock Rodents Bears Elephants
Monotreme Marsupials
