Echinoderms- Ophiuroidea Flashcards
Ophiuroidea has the largest in
Number of species and most abundant
Ophiuroidea contains
Brittle stars, serpent stars, and basket stars
Ophiuroidea have what body structure
Long slender arms and a well defined central disc
In Ophiuroidea ambulacral grooves are
Closed and have no Prdicellariae or papulae
Highly flexible arms allow these organisms to be the most
Mobile in the phylum
Muscles in each arm contract to allow them to
Crawl rapidly
Ophiuroidea contain no ampulla and get food by
Using their arms to take it into their mouthes
Ophiuroidea feed on
Bottom detritus and small animals like worms and crustaceans
How do they catch good
They lift their arms
Basket stars feed by
Rollin up into a ball and attacking their prey
Ophiuroidea have no
Intestine or anus
Some species can actively pump water through
Internal cilia
Gas exchange occurs through
5 pairs of bursar open toward the oral surface by genital slits
These animals can automize their arms to
Free themselves from predators
