Download SPINY-SKINNED

ECHINODERMS
SPINY-SKINNED
Hey Patrick Star!
Who me?
Are you an Echinoderm?
A what?
An Echinoderm!
Uh, I dunno, maybe!
BASIC CHARACTERISTICS
•
ALL ARE MARINE SPECIES
ALL LIVE IN SALT WATER
•
HAVE RADIAL SYMMETRY
•
SKELETON MADE OF SPINES
& PLATES MADE OF CALCIUM
CARBONATE COVERED BY A
LAYER OF SKIN
BASIC CHARACTERISTICS
• ABORAL SURFACE = TOP SURFACE
• ORAL SURFACE = UNDERNEATH
(WHERE MOUTH & TUBE FEET ARE FOUND)
• BODY CAVITY IS FILLED WITH
SEA WATER
• INTERNAL ORGANS & BODY
PARTS ARE DIVIDED INTO
FIVE SECTIONS
BASIC CHARACTERISTICS
• PEDICELLARIA - SMALL PINCERS THAT
KEEP GILLS FREE OF DEBRIS & CAN BE
USED IN DEFENSE
http://www.youtube.com/watch?v=-d5opK8jNLE
• ABSORB OXYGEN THROUGH TUBE FEET
OR FROM THEIR GILLS
• CAN REGENERATE BODY PARTS
WATER VASCULAR SYSTEM
MADREPORITE
STONE
CANAL
RING CANAL
TUBE FEET
AMPULLAE
RADIAL CANAL
WATER VASCULAR SYSTEM
WATER IS TAKEN IN BY THE MADREPORITE.
WATER GOES INTO THE STONE CANAL AND THE
RING CANAL.
THEN FILLS THE RADIAL CANAL IN EACH ARM.
WATER THEN ENTERS EACH AMPULLAE
AND THEN FILLS EACH TUBE FOOT.
BY CONTROLLING THE WATER PRESSURE
THESE ANIMALS CAN MOVE & USE SUCTION TO
HOLD ONTO OBJECTS
Echinoderm intro 2:15
SEA STARS
STOMACH & MOUTH IN
CENTRAL DISK
EXTEND STOMACH OUT
OF BODY TO FEED
EXTERNALLY DIGEST FOOD & THEN
ABSORB NUTRIENTS
DIGESTIVE GLANDS & GONADS IN
EACH ARM
HAVE EYE SPOTS AT TIP OF ARMS
SKELETAL PLATES ARE NOT FUSED
THIS ALLOWS FLEXIBILITY
SEA STAR STOMACH
STOMACH
http://www.youtube.com/watch?v=l6dnmLDu6Eg
NORTHERN SEA STARS
BAT STAR
CUSHION STAR
DAWSON’S SEA STAR
SUNFLOWER STAR
CROWN OF THORNS SEA STAR
BRITTLE STARS
NOCTURNAL–ACTIVE AT NIGHT
FILTER FEED ON PLANKTON
SCAVENGERS: EAT ANYTHING EDIBLE
RAPID CRAWLERS–USE ARMS FOR
LOCOMOTION
ARMS BREAK OFF WHEN THREATENED
OR HELD
DAISY BRITTLE STAR
BURROWING BRITTLE STAR
SPONGE BRITTLE STAR
SPONGE BRITTLE STAR
FEATHER STARS
MOUTH FACES UPWARDS
NOCTURNAL
FILTER FEEDERS
TUBE FEET ON ARMS
TRAP PLANKTON AND
TRANSPORT FOOD TO
THE MOUTH
CIRRUS “LEGS” ARE
USED TO CRAWL AND
HOLD TO ROCKS
FEATHER STAR
GOLDEN FEATHER STAR
YELLOW FEATHER STAR
BLUE FEATHER STAR
Crinoid clip 0:45
SEA URCHINS
ROUND SHELL - NO ARMS
SKELETAL PLATES ARE
FUSED – CAN NOT BEND
LONG SPINES ARE MOVABLE & ARE
USED FOR PROTECTION & TO WEDGE
INTO ROCK CREVICES FOR SECURITY
HERBIVORES – EAT ALGAE & SEAWEEDS
SEA URCHIN CROSS SECTION
SEA URCHIN MOUTH
TEETH
ATLANTIC SEA URCHIN
PURPLE SEA URCHIN
GREEN SEA URCHIN
RED SEA URCHIN
VARIEGATED SEA URCHIN
LONG-SPINED SEA URCHIN
sea urchin harvest 1:00
Fire urchin clip 2:00
SAND DOLLARS
FLAT VERSION OF
SEA URCHINS
TINY BLUNT SPINES
SKELETAL PLATES FUSED
BURROW INTO SAND/MUD
FEED ON PLANKTON & DETRITUS
“PETALS” ARE AREAS OF GILLS
KEYHOLE URCHIN
SAND DOLLAR
SAND DOLLARS
SEA CUCUMBERS
SOFT BODIED - NO HARD SKELETON
5 ROWS OF TUBE FEET
SPINES SCATTERED IN THICK SKIN
FEEDING TENTACLES ARE BIG TUBE FEET
SPINES
TENTACLES
ANUS
TUBE FEET
SEA CUCUMBERS
THE “CLASSY” ECHINODERM
FEED ON SEDIMENT (EAT DIRT) WHICH
CONTAINS BACTERIA, ALGAE, DETRITUS
TAKE IN WATER THROUGH THE ANUS
FOR RESPIRATION
EVISCERATION – THE TALENT OF EXCRETING
A SET OF ORGANS TO OFFER PREDATORS
WHILE YOU ESCAPE & REGENERATE THEM
THE PEARL FISH - A “COZY” COMPANION
WHO LIVES IN THE BODY VIA THE ANUS
SEA CUCUMBER CROSS SECTION
SEA CUCUMBER FEEDING
TENTACLES
DONKEY DUNG SEA CUCUMBER
CONICAL SEA CUCUMBER
THREE-ROWED SEA CUCUMBER
ORANGE-FOOTED SEA CUCUMBER
RED SEA CUCUMBER
PEARL FISH & THEIR
UNSUSPECTING HOSTS
Sea cucumber 1:25