Echinoderms- Echinoidea Flashcards Preview

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Flashcards in Echinoderms- Echinoidea Deck (15):
0

Echinoidea contains

Sea urchins, sand dollars, heart urchins, and sea biskets

1

What is their body structure?

Their bodies are covered with spines

2

The test is the

Shell

3

The test is the endoskeleton which is composed of

Ossicles fused together to create a solid shell like case to live in

4

These organisms lack

Arms

5

These organisms display what symmetry

Bilateral

6

They move by using

Their spines and tubed feet that contain suckers

7

Sea urchins use their spines to

Wedge themselves tightly among rocks

8

Sand dollars and heart urchins like to burrow in

Sandy substrates

9

A unusual five-toothed mouth is called

Aristotle's Lantern

10

Echinoidea use Asistotle's Lantern to

Chew into stone surfaces to form a hiding place in rocks

11

Mouths are located on

The oral surface

12

The anus is on the

Aboral side

13

Sea urchins posses well-developed coiled

Intestines and anus

14

They feed on

Small diatoms and organic debris found on the bottom