Echinoderms- Echinoidea Flashcards
What is their body structure?
Their bodies are covered with spines
Echinoidea contains
Sea urchins, sand dollars, heart urchins, and sea biskets
The test is the
Shell
The test is the endoskeleton which is composed of
Ossicles fused together to create a solid shell like case to live in
These organisms lack
Arms
These organisms display what symmetry
Bilateral
They move by using
Their spines and tubed feet that contain suckers
Sea urchins use their spines to
Wedge themselves tightly among rocks
Sand dollars and heart urchins like to burrow in
Sandy substrates
A unusual five-toothed mouth is called
Aristotle’s Lantern
Echinoidea use Asistotle’s Lantern to
Chew into stone surfaces to form a hiding place in rocks
Mouths are located on
The oral surface
The anus is on the
Aboral side
Sea urchins posses well-developed coiled
Intestines and anus
They feed on
Small diatoms and organic debris found on the bottom
