Domain Eukarya
Kingdom Animalia
•Eukaryotic
•Multicellular
•Nucleus with no cell wall
•Motile at some point
•Consumer
Important vocabulary
• Symmetry – how organism
is divided
 Radial – same in all
directions
 Bilateral – two sides similar
• Coelom – body cavity
 Acoelomate – no coelom
 Pseudocoelomate – lined on
one side with tissue
 Eucoelomate – lined on both
sides with tissue
• Cephalization - Sense
organs are in one area
• Blastopore – early
developmental stage
• Tissue layers - # of tissues
(and what it becomes)
 Endoderm -inner
 Ectoderm- outer
 Mesoderm -middle
• Gut – digestive organs
 Gastrovascular cavity
 complete (mouth to anus)
• Segmentation – is body in
repeated sections
• Cleavage
 Spiral - Protostome
 Radial - Deuterostome
Ceolom
Symmetry
Tissue Layers
Gut
Cleavage
Blastopore
Cephalization
Segmentation
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Phylum to Know
Porifera – sponges
Cnidaria – sea anemones, corals, jellyfish
Platyhelminthes- flatworms
Nematoda – roundworms
Annelida – segmented worms (earthworms)
Mollusca – snails, shellfish, slugs
Arthropoda – insects, crustaceans, spiders
Echinodermata – sea urchins, sea cucumbers
Chordata - fish, amphibians, birds, us
Others mentioned – Ctenophores, Rotifers,
Hemichordata
Phylum Porifera - Sponges
• Multicellular
• Asymmetrical – no
symmetry
• No body tissues
• Skeleton of CaCO3 or
silica
• Filter feeder
• Hermaphroditic
• Can reproduce asexually
by splitting or budding
Phylum Cnidaria – Corals, jellyfish
• Radial symmetry
• 2 tissue layers (endo,
ectoderm, mesoglea)
• Gastrointestinal sac
• Hermaphroditic
• Can reproduce
asexually by budding
or splitting (coral)
• Stinging cells
(Nematocyst)
Phylum Platyhelminthes - flatworms
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Bilateral symmetry
3 tissue layers
Acoelomate
Gastrointestinal sac
Some cephalization
Can reproduce
asexually by fission
(splitting)
Phylum Nematoda - roundworms
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Bilateral symmetry
3 tissue layers
Psuedocoelomates
True gut – mouth to
anus
• Most separate sexes
Phylum Annelida – segmented worms
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Bilateral symmetry
3 tissue layers
Euceolomate
Complete gut – mouth
to anus
Cephalization
Segmented
Spiral cleavage –
Protostome
Blastopore forms
mouth
Phylum Mollusca – Clams, snails, squid
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Bilateral symmetry
3 tissue layers
Euceolomate
Complete gut –
mouth to anus
Cephalization
Segmented
Spiral cleavage –
Protostome
Blastopore forms
mouth
Shelled- 1 or 2 (some
lost or internal)
Phylum Arthropoda – Insects, spiders, crabs
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Bilateral symmetry
3 tissue layers
Euceolomate
Complete gut – mouth
to anus
Cephalization
Segmented
Spiral cleavage –
Protostome
Blastopore forms
mouth
Exoskeleton of chitin
Phylum Echinodermata - sea star, sea urchin
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Bilateral symmetry
3 tissue layers
Euceolomate
Complete gut – mouth to
anus
Cephalization
Segmented
Radial cleavage –
Dueterostome
Blastopore forms anus
Pentamerous symmetry as
adult
Asexual and sexual
reproduction
Phylum Chordata – lancelets, sea squirts, us
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Bilateral symmetry
3 tissue layers
Euceolomate
Complete gut –
mouth to anus
Cephalization
Segmented
Radial cleavage –
Dueterostome
Blastopore forms anus
Notochord – spine, skull
Dorsal hollow nerve chord –
spinal cord, brain
Pharyngeal gill slits - pharynx
Post-anal tail - coccyx
Chordate sub phylum
• Urochordata • Cephalochordata
• Sea squirt or • Lancelet
tunicate
• Sessile as
adult
• Vertebrata
• Includes 6/7
classes
• Agnatha
• Chondrichtyes
• Osteicthyes
• Amphibia
• Reptilia
• Aves
• Mammalia
Class Agnatha – jawless fish
• Skull
• Lack jaws
 Hagfish
 Lampreys
Class Chondricthyes –
cartilaginous fish
• Cartilaginous skeleton
• Jaw
 sharks
 skates
 rays
Class Osteicthyes – bony fish
• Skeleton of bone
 Tuna
 Salmon
 All other
familiar fish
Class Amphibia – Salamanders,
toads, frogs, caecilians
• Four walking legs
• Water as young,
land as adult
• Needs water for eggs
• Moist skin
Class Reptilia – Snakes, lizards,
turtles, tortoise, crocidilians, tuataras
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Scaly skin
Lungs
Claws
AMNIOTIC EGG
Amniotic egg
Class Aves - birds
• Feathers
• Endotherm – steady
internal body temp.
• Wings
• Toothless beak
Class Mammalia
– horses, us
• Fur
• Mammary glands –
milk
• 4 chambered heart
• Endotherm
 Monotreme – egg
laying
 Marsupial – pouched
 Placental – live birth
with placenta
Which is yours?