ANIMALSWHAT IS AN ANIMAL?

ANIMALS ARE MANY CELLED ORGANISMS THAT MUST OBTAIN THEIR FOOD BY EATING OTHER ORGANISMS.

•NEED WATER, FOOD, AND OXYGEN TO SURVIVE

•HETEROTROPHS

•REPRODUCE SEXUALLY

•CAN BE CARNIVORES (MEAT EATING), HERBIVORES (PLANT EATING) OR OMNIVORES (BOTH PLANTS AND ANIMALS)

SYMMETRYWHAT IS SYMMETRY?

RADIAL SYMMETRY- THE QUALITY OF HAVING MANY LINES OF SYMMETRY THAT ALL PASS THROUGH A CENTRAL POINT. EXAMPLE - BICYCLE WHEEL

BILATERAL SYMMETRY- line symmetry, the quality of being divisible into two halves that are mirror images.

SYMMETRY

SPONGES CHARACTERISTICS

•stay in one place/ do not move

•no symmetry/ irregular shapes

•lack tissue and organs

HOW IS A SPONGE DIFFERENT FROM A PLANT?

ANSWER: IT HAS TO TAKE FOOD INTO ITS BODY

HOW DOES A SPONGE GET ITS FOOD AND OXYGEN?

MOVING CURRENTS BRING IN FOOD (BACTERIA AND

PROTISTS) AS WELL AS OXYGEN (DIFFUSION)

SPONGES

CNIDARIANSCHARACTERISTICS

•STINGING CELLS

•TAKE FOOD INTO A HOLLOW CENTRAL CAVITY

•CARNIVORES

•SPECIALIZED TISSUE (MUSCLE/NERVE SYSTEM)

•RADIAL SYMMETRY

•2 BODY SHAPES - POLYP AND MEDUSA

•EXAMPLES - JELLYFISH, SEA ANEMONES, AND

CORALS

CNIDARIANS

LIFE ON A CORAL REEF

WORMSCHARACTERISTICS

•INVERTEBRATES

•LONG NARROW BODIES WITHOUT LEGS

•HAVE TISSUES ORGANS AND ORGAN SYSTEMS

•BILATERAL SYMMETRY (HEAD AND TAIL ENDS)

•THREE GROUPS - FLAT, ROUND, SEGMENTED

•SIMPLEST ORGANISMS WITH A BRAIN

•CAN EXHIBIT REGENERATION (ABILITY TO REGROW A BODY PART).

WORMSFLATWORMS - FLAT, PARASITES THAT OBTAIN THEIR HOSTS. EXAMPLES: PLANARIANS, FLUKES, AND TAPEWORMS

ROUNDWORMS - ROUND BODIES THAT HAVE A DIGESTIVE SYSTEM THAT IS LIKE A TUBE, OPEN AT BOTH ENDS. FOOD ENTERS THROUGH THE MOUTH AND EXITS AT AN ANUS

SEGMENTED WORMS - RINGS SEPERATED BY GROOVES/LINKED SECTIONS EX.EARTHWORMS, LEECHES

WORMS

WORMS

MOLLUSKS CHARACTERISTICS

•INVERTEBRATES

•SOFT BODIES PROTECTED WITH A HARD SHELL

•MANTLE - TISSUE WHICH COVERS THE INTERNAL ORGANS AND PRODUCES THE SHELL

•HAVE A “FOOT” USED FOR DIGGING, MOVING, OR CATCHING PREY

•BILATERAL SYMMETRY

•KIDNEY,GILLS, AND REDULA (FLEXIBLE RIBBON OF TEETH (WORKS LIKE SAND PAPER)

•EXAMPLES - CLAMS, OYSTERS, SCALLOPS, SNAILS, OCTOPUSES.

MOLLUSKS

ARTHROPODSCHARACTERISTICS

•INVERTEBRATE

•EXTERNAL SKELETON / EXOSKELETON

•SEGMENTED BODY

•JOINTED ATTACHMENTS CALLED APPENDAGES EX. WINGS, MOUTH PARTS, LEGS,

•ARTHRO - JOINT POD-FOOT OR LEG

•MOLTING - PROCESS OF SHEDDING AN EXOSKELETON

WHY WOULD ARTHROPODS UNDERGO MOLTING?

TYPES OF ARTHROPODSCRUSTACEANS - TWO OR THREE BODY SECTIONS AND THREE PAIRS OF APPENDAGES FOR CHEWING, 5 OR MORE PAIRS OF LEGS, TWO PAIRS OF ANTENNA (SENSE ORGANS)

EXAMPLES : SHRIMP, LOBSTER

ARACHNIDS - ONLY HAVE TWO BODY SECTIONS, 8 LEGS, NO ANTENNAE

EXAMPLES : SPIDERS, TICKS, MITES, SCORPIONS

INSECTS - 3 BODY SECTIONS, SIX LEGS, ONE PAIR OF ANTENNAE, ONE - TWO PAIRS OF WINGS EXAMPLES : BUTTERFLIES, BEES, BEETLES, FLIES,

CRUSTACEANS

ARACHNIDS

INSECTS

ECHINODERMSCHARACTERISTICS

•RADIAL SYMMETRY

•INVERTEBRATE

•LIVES ON OCEAN FLOOR

•“SPINY SKIN”

•ENDOSKELETON (INTERNAL SKELETON)

•EXAMPLES: SEA STARS, SEA URCHINS, SAND DOLLARS, SEA CUCUMBERS

ECHINODERMS

CHORDATES

FISH –

AMPHIBIANS –

REPTILES –

CHORDATES

CHORDATES

BIRDS –

MAMMALS –

FISH

AMPHIBIANS

REPTILES

BIRDS

MAMMALS