ECHINODERMS
ECHINODERMS
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Means spiny skin
ECHINODERMS
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Means spiny skin
include sea stars, sea cucumbers, sea urchins and
sand dollars
SEA CUCUMBER
SAND DOLLAR
SEA URCHIN
SEA URCHIN
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http://www.racerocks.com/racerock/archives/v
idpurpleurchin2a.htm
ECHINODERMS
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Means spiny skin
include sea stars, sea cucumbers, sea urchins and
sand dollars
ENDOSKELETON-internal skeleton
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made of spines
ECHINODERMS
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Means spiny skin
include sea stars, sea cucumbers, sea urchins and
sand dollars
ENDOSKELETON-internal skeleton
made of spines
 spines made of calcium carbonate
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ECHINODERMS
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Means spiny skin
include sea stars, sea cucumbers, sea urchins and
sand dollars
ENDOSKELETON-internal skeleton
made of spines
 spines made of calcium carbonate
 covered in thin layer of skin
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ECHINODERMS
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Means spiny skin
include sea stars, sea cucumbers, sea urchins and
sand dollars
ENDOSKELETON-internal skeleton
made of spines
 spines made of calcium carbonate
 covered in thin layer of skin
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ECHINODERMS
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Usually have 5 arms around a central disk
ECHINODERMS
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Usually have 5 arms around a central disk
RADIALLY symmetrical-radiate around a
central point (like spokes of a tire)
ECHINODERMS
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Usually have 5 arms around a central disk
RADIALLY symmetrical-radiate around a
central point (like spokes of a tire)
live only in the ocean
ECHINODERMS
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Usually have 5 arms around a central disk
RADIALLY symmetrical-radiate around a
central point (like spokes of a tire)
live only in the ocean
no well defined head
ECHINODERMS
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Usually have 5 arms around a central disk
RADIALLY symmetrical-radiate around a
central point (like spokes of a tire)
live only in the ocean
no well defined head
circulatory, respiratory and excretory systems
missing
ECHINODERMS
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Have a nervous system, but no brain
SEA STARS
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Common name=star fish
SEA STARS
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Common name=star fish
range from 1cm to 1 m in diameter
SEA STARS
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Common name=star fish
range from 1cm to 1 m in diameter
made of central disk and 5 tapered RAYS (arms)
SEA STARS
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Common name=star fish
range from 1cm to 1 m in diameter
made of central disk and 5 tapered RAYS (arms)
CENTRAL DISK-area of mouth and stomach
SEA STARS
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Common name=star fish
range from 1cm to 1 m in diameter
made of central disk and 5 tapered RAYS (arms)
CENTRAL DISK-area of mouth and stomach
NERVE RING-surrounds mouth
SEA STARS
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Nervous system=nerve ring and nerves radiating
out from ring
SEA STARS
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Nervous system=nerve ring and nerves radiating
out from ring
WATER VASCULAR SYSTEM-used for
movement and getting food
SEA STARS
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Nervous system=nerve ring and nerves radiating
out from ring
WATER VASCULAR SYSTEM-used for
movement and getting food
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SIEVE PLATE-water enters
SEA STARS
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Nervous system=nerve ring and nerves radiating
out from ring
WATER VASCULAR SYSTEM-used for
movement and getting food
SIEVE PLATE-water enters
 STONE CANAL-tube leading from sieve plate
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SEA STARS
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Nervous system=nerve ring and nerves radiating out
from ring
WATER VASCULAR SYSTEM-used for movement
and getting food
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SIEVE PLATE-water enters
STONE CANAL-tube leading from sieve plate
Ring canal-surrounds central disk
RADIAL CANALS-extend down each ray from stone canal
AMPULLA-forms suction
SEA STAR
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TUBE FEET-connected to radial canal
SEA STAR
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TUBE FEET-connected to radial canal
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hollow cylinders that act as suction disks
SEA STAR
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TUBE FEET-connected to radial canal
hollow cylinders that act as suction disks
 help in movement
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SEA STAR
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TUBE FEET-connected to radial canal
hollow cylinders that act as suction disks
 help in movement
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Sea stars eat mollusks
SEA STAR
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TUBE FEET-connected to radial canal
hollow cylinders that act as suction disks
 help in movement
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Sea stars eat mollusks
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pry open shells
SEA STAR
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TUBE FEET-connected to radial canal
hollow cylinders that act as suction disks
 help in movement
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Sea stars eat mollusks
pry open shells
 turns stomach inside out through its mouth
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SEA STAR
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TUBE FEET-connected to radial canal
hollow cylinders that act as suction disks
 help in movement
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Sea stars eat mollusks
pry open shells
 turns stomach inside out through its mouth
 inserts stomach into shell, starts digestion right away
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SEA STARS
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REGENERATION-ability to regrow lost parts
(ex. Arms)-central disk has to remain
SKIN GILLS-gas exchange (in addition to tube
feet)
SEA STAR FEEDING
SEA STAR CLEANING
STOMACH
OTHER ECHINODERMS
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SEA CUCUMBER-shaped like cucumber
OTHER ECHINODERMS
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SEA CUCUMBER-shaped like cucumber
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mouth on one end, tentacles all around
OTHER ECHINODERMS
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SEA CUCUMBER-shaped like cucumber
mouth on one end, tentacles all around
 anus on other end
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OTHER ECHINODERMS
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SEA CUCUMBER-shaped like cucumber
mouth on one end, tentacles all around
 anus on other end
 ejects internal organs when attacked
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OTHER ECHINODERMS
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SEA CUCUMBER-shaped like cucumber
mouth on one end, tentacles all around
 anus on other end
 ejects internal organs when attacked
 regenerates lost parts
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OTHER ECHINODERMS
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SEA URCHINS-large spines, look like prickly
burr
OTHER ECHINODERMS
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SEA URCHINS-large spines, look like prickly
burr
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use spines to move
OTHER ECHINODERMS
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SEA URCHINS-large spines, look like prickly
burr
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use spines to move
SAND DOLLARS-flat and smooth-small spines
IMPORTANCE OF
MOLLUSKS/ECHINODERMS
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Food
IMPORTANCE OF
MOLLUSKS/ECHINODERMS
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Food
used at one time as money (clams)
IMPORTANCE OF
MOLLUSKS/ECHINODERMS
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Food
used at one time as money (clams)
shells are sold
IMPORTANCE OF
MOLLUSKS/ECHINODERMS
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Food
used at one time as money (clams)
shells are sold
make jewelry etc.
IMPORTANCE OF
MOLLUSKS/ECHINODERMS
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Food
used at one time as money (clams)
shells are sold
make jewelry etc.
pearls
IMPORTANCE OF
MOLLUSKS/ECHINODERMS
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Food
used at one time as money (clams)
shells are sold
make jewelry etc.
pearls
farms
IMPORTANCE OF
MOLLUSKS/ECHINODERMS
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Food
used at one time as money (clams)
shells are sold
make jewelry etc.
pearls
farms
fertilizer