1
Q
Properties
A
Spiny skinned animal
( DERMIS –> EPIDERMIS –> CUTICLE –> SPINE IN SKIN)
It has calcerous ossicles as endoskeleton
2
Q
Habitat
A
Exclusively marine
3
Q
LOO
A
Organ system
4
Q
Symmetry
A
Larva - bilateral
Adult - radial
5
Q
BP
A
Tube within tube
6
Q
Germ layer
A
Triploblastic
7
Q
Coelom
A
Eucoelomate
8
Q
Metamerism
Notochord
A
No
No
9
Q
Special property
A
Echinoderms have water vascular system which enables them for respiration, excretion and also locomotion
10
Q
DS
A
Complete DS,
Mouth is on lower side ( ventral ) and anus on upper side (dorsal)
11
Q
RS
A
Tube feet
12
Q
CS
A
Open
13
Q
ES
A
Water vascular system helps
14
Q
Reproduction
A
Sexual and unisexual both
15
Q
Fertilization
A
External
16
Q
Development
A
Indirect
17
Q
Examples
A
1) Asterias (star fish)
2) Antedon (sea lily)
3) Cucumaria (sea cucumber)
4) Ophiura (brittle star)
5) Echinus (sea urchin)
ANIMAL KINGDOM (ZOO)
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