Echinoderms- Ophiuroidea Flashcards Preview

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Flashcards in Echinoderms- Ophiuroidea Deck (14):
0

Ophiuroidea contains

Brittle stars, serpent stars, and basket stars

1

Ophiuroidea has the largest in

Number of species and most abundant

2

Ophiuroidea have what body structure

Long slender arms and a well defined central disc

3

In Ophiuroidea ambulacral grooves are

Closed and have no Prdicellariae or papulae

4

Highly flexible arms allow these organisms to be the most

Mobile in the phylum

5

Muscles in each arm contract to allow them to

Crawl rapidly

6

Ophiuroidea contain no ampulla and get food by

Using their arms to take it into their mouthes

7

Ophiuroidea feed on

Bottom detritus and small animals like worms and crustaceans

8

How do they catch good

They lift their arms

9

Basket stars feed by

Rollin up into a ball and attacking their prey

10

Ophiuroidea have no

Intestine or anus

11

Some species can actively pump water through

Internal cilia

12

Gas exchange occurs through

5 pairs of bursar open toward the oral surface by genital slits

13

These animals can automize their arms to

Free themselves from predators