Cnidaria & Ctenophora. Cnidaria Radially symmetrical Tentacles contain nematocysts (stinging cells)
C N I D A R I A - Sewanhaka High School...intro – 1:48 1. RADIAL SYMMETRY MOUTH IN CENTER OF BODY...
Transcript of C N I D A R I A - Sewanhaka High School...intro – 1:48 1. RADIAL SYMMETRY MOUTH IN CENTER OF BODY...
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C N I D A R I A THOSE PESKY
ANIMALS WITH
STINGING CELLS!!!
CNIDARIA MEANS “STINGING CELL”
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BASIC ORGANISM TYPES
HYDRA
JELLYFISH
SEA
ANEMONE
CORAL
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cnidaria intro – 1:48
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1. RADIAL SYMMETRY
MOUTH IN CENTER OF
BODY SURROUNDED
BY TENTACLES
PROVIDES FOOD &
PROTECTION FROM
ALL SIDES
TENTACLES MOUTH
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2. ONE OPENING SYSTEM FOOD ENTERS THE
MOUTH & IS DIGESTED
IN THE STOMACH
WASTES ARE EXCRETED
THROUGH THE MOUTH
WASTES,
GAMETES
OUT
REPRODUCTIVE CELLS
(SPERM/EGG) (GAMETES)
ARE RELEASED FROM THE
MOUTH
FOOD IN
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STINGING CELLS
CALLED CNIDOCYTES
COVER TENTACLES
FOR PROTECTION & TO
CAPTURE PREY
CNIDARIANS ARE
PASSIVE CARNIVORES
3. TENTACLES WITH
STINGING CELLS
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catching food – 2:12
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4. TWO TISSUE LAYERS
1. EPIDERMIS –
OUTER LAYER
2. GASTRODERMIS –
STOMACH CAVITY
MESOGLEA – JELLY-LIKE
MATERIAL BETWEEN TISSUE
LAYERS
ABUNDANT IN JELLYFISH
TO HELP THEM FLOAT
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5. NERVE NET
NERVES COVER THE
BODY BUT CAN NOT
TELL THE
DIFFERENCE
BETWEEN BODY
PARTS.
THERE IS NO BRAIN
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POLYP CHARACTERISTICS
1. LOCOMOTION - STATIONARY
2. TENTACLES – EXTEND UPWARD
3. MOUTH – ON TOP OF BODY
4. MESOGLEA – VERY LITTLE
5. PEDAL DISK – USED FOR
ATTACHMENT
6. EXAMPLES – HYDRA, CORAL,
SEA ANEMONES
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RINGED ANEMONE
RMJA
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RETRACTED ANEMONE
RMJA
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sea anemone fight – 1:22
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MEDUSA CHARACTERISTICS
1. LOCOMOTION – MOBILE/FLOAT
2. TENTACLES – HANG DOWN
3. MOUTH – UNDERNEATH BODY
4. MESOGLEA – HELPS IT TO FLOAT
5. STATOCYSTS – SPECIAL CELLS
FOR BALANCE
6. EXAMPLES – JELLYFISH
5. ORAL ARMS – TO HOLD PREY
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MOON JELLYFISH
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SEA WASP – BOX JELLYFISH
RMJA
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jellyfish video – 4:38
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FEEDING BEHAVIOR
2. CNIDOCYTES – COVER THE TENTACLES,
(stinging cells) THEY CONTAIN NEMATOCYCSTS
3. NEMATOCYSTS - STINGING THREADS
1. TENTACLES - ARM-LIKE EXTENSIONS
AROUND THE MOUTH
2. CNIDOCYTE
4. TRIGGER
1. TENTACLES
3. NEMATOCYST
4. TRIGGER - RELEASE THE NEMATOCYST
WHEN TOUCHED
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FORMATION OF CORAL REEFS
CORAL REEFS ARE BUILT BY MILLIONS OF CORAL
POLYPS OVER THOUSANDS OF YEARS
EACH POLYP CREATES A “CUP” OF CALCIUM
CARBONATE TO LIVE IN
CORALS REPRODUCE ASEXUALLY BY BUDDING, THIS
PROCESS HELPS COLONIES TO GROW
OLD SKELETONS
“CUPS”
POLYPS ARE
CONNECTED
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FORMATION OF CORAL REEFS
CORALS REPRODUCE SEXUALLY ONCE A YEAR BY
RELEASING SEX CELLS INTO THE WATER.
THIS HELPS TO ESTABLISH NEW COLONIES
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CORAL SPAWNING – 2:55
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HARD CORALS
REEF BUILDERS –
USE CALCIUM FOR SKELETON
EACH SPECIES HAS A UNIQUE
COLONY & CUP DESIGN
EXAMPLES:
BRAIN,
ELKHORN,
STAR
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BRANCHING CORAL POLYPS
RMBO
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LACE CORAL
RMBO
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BRANCHING CORAL - night
RMBO
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BRANCHING CORAL - day
RMBO
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BOULDER CORAL - night
RMBO
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BOULDER CORAL - day
RMBO
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BOULDER CORAL POLYPS
RMBO
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ROSE CORAL
RMBO
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LETTUCE CORAL
RMJA
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FLOWER CORAL w/ ARROW CRAB
RMJA
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ORANGE CUP CORAL
RMJA
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SOFT CORALS SECRETE CALCIUM SPICULES IN A FLEXIBLE
SUBSTANCE CALLED GORGONIN
EX: SEA FANS, SEA WHIPS
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GIANT SEA WHIP DAN
RMBO
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SEA PLUME
RMBO
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PURPLE SEA FANS
RMBO
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DEEP-SEA FAN
RMBO
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FIRE CORALS & HYDRAS
NOT TRUE CORALS
THEY ARE HYDRA WHICH CREATE
A HARD STRUCTURE
FIRE CORAL STINGS RESULT IN EXTREME
IRRITATION ON SKIN
RMJA RMJA
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FIRE CORAL
RMPR
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FERN HYDROID
RMPR
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HERMIT CRAB WITH HYDRA
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TUBULERIA HYDROIDS
RMNY
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PORTUGUESE MAN OF WAR
ACTUALLY A COLONY
OF 4 TYPES OF POLYPS
1. create the float.
2. make the tentacles.
3. digests the food.
4. perform reproduction.
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SYMBIOTIC
RELATIONSHIPS
EACH ORGANISM HELPS THE OTHER TO
SURVIVE, LIKE BEST FRIENDS.
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1. SEA ANEMONE & SMALL FISH OR SHRIMP
BENEFIT FOR FISH OR SHRIMP:
BENEFIT FOR THE ANEMONE:
GET PROTECTION & FOOD SCRAPS
PREY IS ATTRACTED TO OTHER ANIMAL
INCREASING CHANCE OF FOOD
2. JELLYFISH & SMALL FISH
SAME RELATIONSHIP
AS ABOVE
FISH AND SHRIMP CLEAN
THE TENTACLES
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Large jelly with “medusa
fish”
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ANEMONE w/cleaner shrimp
RMBO
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SEA ANEMONE & HERMIT CRABS
BENEFIT FOR ANEMONE - MOBILITY & EXTRA FOOD FROM CRAB
BENEFIT FOR HERMIT CRAB - PROTECTION & CAMOUFLAGE
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HERMIT CRAB WITH ANEMONES
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symbiosis – 3:16
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CORALS EXPEL THE ALGAE
FROM THEIR BODIES & TURN WHITE
(ALGAE GAVE THEM COLOR). THEY WILL
STARVE & DIE WITHOUT THE ALGAE.
4. CORAL & ZOOXANTHELLAE ALGAE
ALGAE CELLS LIVE IN THE TISSUES OF
THESE ANIMALS.
THEY PRODUCE FOOD (GLUCOSE)
FOR THE CORAL
THE CORAL PROVIDES A HOME
CORAL BLEACHING
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Coral Bleaching video – click once to play
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COMB JELLIES PHYLUM CTENOPHORA
DO NOT HAVE STINGING
CELLS USE CILIA TO
FILTER WATER
BASIC CHARACTERISTICS:
TENTACLES ARE STICKY
TO CATCH FOOD
MOST CREATE LIGHT THROUGH
BIOLUMINESCENCE
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COMB JELLY
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COMB JELLY
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Up Close & Personal
with a
Sea
Anemone
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TENTACLES –
capture prey & carry
food to the mouth
MOUTH RING –
expands & contracts
to open & close
around different food
SEPTA – walls which
secrete enzymes &
absorb nutrients
PEDAL DISK –
muscular tissue for
attachment to surface ACONTIA –
filaments used for
defense & digestion
GONADS – produce
sperm & egg cells for
sexual reproduction
BODY WALL –
has muscles for
contraction &
expansion
STOMACH –
cavity where
digestion occurs
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