Axial sinus
Dermal papillae
Tube feet
Tiedamann bodies
C. Tube feet
Starfish
Jellyfish
Cuttlefish
Fresh water mussel
Sea hares
Brittle stars
Star fishes
Sea fish
herbivorous
omnivorous
carnivorous
none of these
echinodea
holothuroidea
asteroidea
ophiuroidea
pluteus
echinopluteus
bipinnaria
auricularia
number of arms
structure of the ambulacral groove
tube feet
pedicellariae
coelenterates
marine arthropods
echinodermates
sponges
bipinnaria
glochidium
auralia
echinus
Antedon
Echinocardium
Ophiothrix
Pentaceros
Sea-star
Star fish
Sea-cucumber
Sea lily
Nervous system with a large brain
Respiratory system
System of internal seleton
Excretory system
Sea cucumber
Sea lily
Sea urchin
Sea star
mouth apparatus
exoskeleton
skeletal system
bioluminscent organ
redia and cercaria
bipinnaria and brachiolaria
trochophore and aurecularia
none of these
tube feet
lobopodia
cephalopodia
rhizopodia
spines
tube feet
integumentary structures
none of these
A fresh water echinoderm
An ancient Greak ship lantern shaped structure connected with balancing system of seal lily
A masticatory apparatus connected with digestive system in sea urchin
A seive plate connected with ambulacral system in sea star
haemal system
digestive system
ambulacral system
reproductive system
Holothuria (sea cucumber)
Echinus (sea urchin)
Echittocardium (sand dollar)
Antedon (feather star)
Schizocoelic coelom
Water vascular system
Spines in the body mass
Marine habitat
(a) Starfish
(b) Brittle star
(c) Sea lily
(d) None of these
coelenterates
polychaetes
echinodermates
hemichordates
sea-hares
sea-stars
devil fish
sea fans
Snail
Slug
Nereis
Sea-urchin
Star fish
Sea fan
Ship worm
None of these
Asterias
Antedon
Echinus
Ophiothrix
an exoskeleton
a spiny skin
bilateral symmetry
gastrovascular cavity
Sea star
sea urchin
Sea cucumber
Feather star
digestive system
water vascular system
canal system
none of these
excretion
absorption
reproduction
respiration