Domain EukaryaDomain Eukarya

Kingdom Animalia

Coelom?

Body cavity - space between digestive tract wall and body wall, surrounded by mesoderm cells, location of organs

Phyla: Mollusca, Annelida, Arthropoda, Echinodermata, Chordata

Pseudocoelom?

Space around digestive cavity, not surrounded by mesoderm cells

Phylum Nematoda

gut

gut gut

SymmetryBalance or arrangement of parts

asymmetry- no symmetry

Porifera

radial- wheel plan

Porifera, Cnidaria, Echinoderm adults

bilateral- 2 sided

Echinoderm larva, Platyhelminthes, Arthropods, Annelids, Chordata

Protostome?

Coelom develops from a solid mass of cells, blastopore becomes mouth

Mollusca, Annelida, Arthropoda

Mouth

Deuterostome?

Coelom forms from outgrowth of digestive tube, blastopore becomes anus

Echinodermata, Chordata

Anus

Domain EukaryaDomain Eukarya

Kingdom Animalia

TraitsEukaryoteMulticellularHeterotrophNo cell wallDiploid except for gametesMost internal digestionMost zygotes with developmental

stages

Animals probably evolved from colonial protists

Phylum PoriferaTraits

Radial or asymmetry 3 layers of cells, no tissues or

organsNo developmental stages or

layersCellular digestionWater dwelling

Examples: sponge

Phylum CnidariaTraits:

Radial symmetry Tissues (muscle, nerve) no organs 2 developmental layers (endo &

ectoderm) No coelom One opening Tentacles with stinging cells Water dwelling

Phylum CnidariaExamples: coral, hydra, sea anemone, jellyfish

Phylum PlatyhelminthesTraits:Bilateral symmetrySimple organs and systems3 developmental layers (endo,

ecto, mesoderm)No coelomOne opening

Examples: planaria, flukes, tapeworms

tapeworm

fluke

Phylum NematodaTraits:

Bilateral Organs and systems (no circulatory) 3 developmental layers Pseudocoelom 2 openings

Examples: nematodes of soil & water, trichina parasites

Phylum Mollusca

Traits:Bilateral, 3 layers, 2 openings,

coelomOrgans and systems (open

circulatory)Coelom (protostome)

Examples: snail, slug, oyster, octopus, clam

Phylum Annelida

Traits:Bilateral, 3 layers, 2 openings,

coelom Systems (closed circ)SegmentsCoelom (protostome)

Examples: earthworms, sandworms, leeches

Phylum Arthropoda

Traits:Bilateral, 3 layers, 2 openingsCoelom (protostome)Exoskeleton of chitinJointed appendages

Examples: spider, insect, lobster, scorpion, tick

Phylum Arthropoda

5 classes:Horseshoe crabsArachnids (spiders)Crustaceans (lobsters, crabs)Millipedes and centipedesInsects (grasshoppers, bees,

butterflies, ants, mosquitoes)

Phylum Echinodermata

Traits:Bilateral larvae, radial adults3 layers, 2 openingsCoelom (deuterostome)Endoskeleton Water vascular system, marine

Examples: starfish, sea urchin, sea cucumber

Phylum ChordataTraits:

Bilateral, 3 layers, 2 openingsCoelom (deuterostome)Dorsal, hollow nerve cordNotochord (cartilage rod in back)Gill structuresPost-anal tail

Invertebrate examples: tunicates, lancelets

tunicate

Lancelet

Classes Vertebrate chordates

Agnatha- Jawless fish- lamprey

Classes Vertebrate chordates

Chondrichthyes- cartilage fish, gill slits, no scales- sharks, rays

Ray

Classes Vertebrate chordates

Osteichthyes- bony fish, scales, operculum- tuna, trout, koi

Classes Vertebrate chordates

Amphibian- no hard shell on eggs, moist skin, reproduce in water- frogs, toads, salamanders

Classes Vertebrate chordates

Reptilia- shelled (amniotic) egg, cold blooded (ectothermic), scales-lizards, snakes, alligators, turtles

Classes Vertebrate chordates

Aves- shelled amniotic egg, warm blooded (endothermic), scales & feathers

birds of all kinds

Classes Vertebrate chordates

Mammalia- hair, warm blooded, amniotic egg that developes inside mother, mammary glands –

bat, dolphin, kangaroo, human