Exam 3 Flashcards
1
Q
What system do echinoderms (starfish) use for movement?
A
water vascular system
2
Q
what do all echinoderms have? (3 things)
A
calcareous endoskeleton, pepdicellariae, and dermal gills
3
Q
what is the purpose of pepdicellariae in starfish?
A
to keep skin free of debris and parasites
4
Q
are starfish radial or bilateral?
A
they’re radial as adults, bilateral as larvae
5
Q
4 characteristics of chordata
A
- dorsal nerve cord
- notochord (basically spine)
- pharagyneal slits
- post anal tail
6
Q
A
