Echnioderms Flashcards
What does echinoderm mean?
spiny skinned
What features distinguish protostomes from deuterostomes?
Protosomes: blastula becomes mouth
Deuterostomes : blastula becomes anus
Where do all echinoderms live?
sea
How many arms do star fish have?
five
What is a madreporite?
sieve like covering to the opening of the vascular system
Name a genus of a british star fish and a sea urchin
Asterias
Echinus
What kind of feet do most echinoderms have?
tubed feet
What are the 5 major modern echinoderm classes?
Asteroidea star fish Echinoidea sea urchins Crinoidea feather stars Ophiuroidea brittle stars Holothurioidea sea cucumbers
What is the system of canals that connect with the tube feet of echnioderms
water vascular system
What do brittle stars lack
gut and anus
What do sea urchins chew with?
Aristotles lantern
What are pincher like strcutures on surface of echindoerms called
pedicellariae
How do holothuroidea breathe?
Respiratory tree
What are crinoids
Feather stars
What is different with the crinoid structure?
Upside down compared to other echinoderms
