Chap 29 Flashcards
(8 cards)
1
Q
What does the water hydraulic system in starfish (stiffens tube feet) consist of?
A
Ring canal, radial canal, ampulla, sieve tube.
2
Q
The nervous system of a starfish is:
A
Simple, nerve ring around mouth, radial nerves to arms.
3
Q
What links Echinoderms to chordate a?
A
Bilateral symmetrical larvae
4
Q
Circulatory system in Echinoderms?
A
Don’t have one! Water vascular system/coelomic fluid help circulate gasses.
5
Q
Pedicellarias?
A
Small pincers, keeps skin clean.
6
Q
Respiration in Echinoderms?
A
Mainly through skin gills but some through tube feet.
7
Q
What structures would you expect to find on the central disk of a starfish?
A
Sieve plate, pedicellaria, anus.
8
Q
Phylum Echinoderms main characteristic is:
A
Spiny-skin
