Transcript Phylum Echinodermata

Or-Lets learn more about our Spiny Skinned
Friends!
Spiny
internal
skeletonendoskeleton
Radial symmetry
Body parts in
multiples of 5
Water vascular system
Fluid filled tubes that fill
an echinoderm’s body.
Parts of the tubes can
contract, squeezing water
into tube feet. Tube feet
are sticky on the end and
when filled with water,
they are like suction cups.
The tube feet allow the
echinoderm to hold onto
the surface under them
or another animal.
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 Echinoderms can
reproduce sexually-male and
female echinoderms release egg and sperm into
the water. The fertilized eggs become tiny,
swimming larvae and eventually become adult
echinoderms.
 Echinoderms can also reproduce asexually-some
species of sea stars can grow a whole new animal
from an arm!
 Many
echinoderms can regenerate-grow new
body parts when one is lost.
 Brittle stars (cousins to sea stars) have long
flexible arms that they use to move. They don’t
have tube feet, to move they push themselves
along the ground.
 Sea cucumbers have tentacles around their mouth
like a sea anemone. But unlike sea anemones,
they are not sessile. Sea cucumbers have tube
feet that allow them to move slowly along the
ocean floor.