Echinoderms Flashcards
1
Q
A marine invertebrate, such as a starfish, sea urchin, or sea cucumber.
A
Echinoderm
2
Q
An internal skeleton
A
Endoskeleton
3
Q
A defensive organ like a minute pincer present in large numbers on an echinoderm.
A
Pedicellariae
4
Q
A perforated plate by which the entry of seawater into the vascular system.
A
Madreporite
5
Q
In the arm of the starfish, part of the many canals that are part of the water vascular system. Carries water to the ampullae and provides suction to the tube feet.
A
Radial canal
6
Q
Brings water to the radial canals. The circular water tube that surrounds the esophagus of echinoderms
A
Ring canal
