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Animal Classification . By Mrs. Herman 2013. Radial Symmetry the animal can be divided into equal parts that arranged around central axis. Bilateral Symmetry can be divided into two parts that are nearly mirror images of each other. Asymmetry - PowerPoint PPT Presentation
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Animal Classification
By Mrs. Herman2013
Animals can be classified by what kind of symmetry it has.
Radial Symmetry the animal can be divided into equal
parts that arranged around central
axis.
Bilateral Symmetry can be
divided into two parts that are nearly mirror
images of each other.
Asymmetrycannot be divided into any two parts
that are nearly mirror images of
each other.
Archaebacteria
Eubacteria
Protista
Animalia
Fungi
Plantae
PoriferaCnidaria
PlatyhelmenthesNematodaChordata *
Annelida
Mollusca
ArthropodaEchinodea
fish
amphilbia
reptilia
bird
mammal
Kingdom Phylum Class
Archaebacteria
Eubacteria
Domain
Eukarya
Phylum Porifera Characteristics:
AsymmetricalNo tissues,
organs or organ systems
All live in water Examples:
Sea Sponges
Phylum Cnidaria Characteristics:
Radial symmetryNo organ or organ
systemsAll live in water
Examples: Jellyfish, sea
anemones, hydras and corals
Phylum Platyhelminthes
Characteristics: Bilateral symmetry Have nerve, muscle
and digestive tissue Soft, flattened
bodies Digestive system
only has one opening (mouth)
Examples: Flatworms including
tapeworm
Phylum Nematoda Characteristics:
Bilateral symmetry Have nerve, muscle
and digestive tissues Bodies are round and
covered with stiff outer covering
Digestive system has two openings (mouth and anus)
Examples: roundworm
Phylum Annelida Characteristics:
Bilateral symmetry soft bodies Repeating segments
covered by a thin cuticle Digestive systems have two
opening Circulatory system made of
blood vessels that carry blood throughout their body
Examples: earthworms, leeches and
marine worms
Phylum Mollusca Characteristics:
Bilateral symmetry Bodies are soft Digestive system with two
openings Body contains heart,
stomach and other organs Circulatory system
contains blood but no blood vessels
Must remain wet Examples:
Snails, slugs, clams, mussels, octopi, squid
Phylum Arthropoda Characteristics:
Bilateral symmetry Exoskeletons – thick, hard outer coverings that protect
and support animals’ bodies Jointed appendages Segmented bodies
Examples: Insects, spiders, shrimp, crabs
Groups of ArthropodaArachnids: horseshoe crabs, spiders, tick,
mites, scorpions (adults have 8 legs)
Crustaceans: crabs, lobsters, barnacles, pill bugs.
Insects – 6 legs, 2 antenna, 3 body segments
millipedes and centipedes – many legs
Phylum Echinodermata Characteristics:
Radial symmetry Echinoderm – spiny
skin Thousands of small
muscular fluid-filled tubes called tube feet
Complete digestive system
Only live in oceans Examples:
Sea star, sea cucumbers, sea urchins
Phylum Cordata - Vertebrates Characteristics:
Well developed organ systems Digestive system with two openings Circulatory system that move blood through
the body Nervous systems that include brains
5 Major Classes (groups): Fish Amphibians Birds Reptiles mammals
Fish Most spend their entire lives in water Contain gills for absorbing oxygen gas
from the water Paired fins for swimming
Groups of Fish Jawless fish – hagfish
and lampreys Cartilaginous fish –
have skeletons made of cartilage and include sharks, skates, rays
Bony fish – have skeletons made of bone and include trout, guppies, tuna and thousands of others.
Amphibians Young live in water and
have gills, adults develop lungs and live on land
Amphibians have skeletons made of bone and 4 legs.
Their skin is smooth and moist
Hearts have 3 chambers Lay eggs without shells or
coverings on land. Examples include frogs,
toads and salamanders
Reptiles Skin is water-proof and
covered in scales 3 chambered hearts Have lungs throughout
their lives Lay eggs with leathery
shells Eggs laid on land Includes lizards, snakes,
turtles, crocodiles and alligators
Birds Many birds make nests to hold their eggs Eggs have hard shells Many have unique calls or songs Lightweight bones Skin covered with feathers and scales Two legs and two winds Many can fly Have beaks and do not chew their food 4 chambered hearts
Mammals Have hair or fur Tear and chew their food using teeth Mammary glands that produce milk to feed young. Most birth live young
Groups of mammals Marsupials
Gives birth to live young but the embryo climbs into the mother’s pouch to continue its development.
Examples include kangaroos Koalas Tasmanian devils wombats
Groups of mammals Monotremes
Lays eggs including only five living species
the duck-billed platypus four species of echidna (also known as
spiny anteaters).
Groups of mammals Placental
all bear live young which are nourished before birth by the
placenta Includes 4000 species including
rodents, bats, whales, elephants, shrews, armadillos as well as dogs, cats, sheep, cattle, horses and humans.