4. BIOLOGY DR ALSAQABI 2020BIOLOGY DR ALSAQABI 2012
True coelom
(annelids
Chordates )
body
wall
coelom
digestive
tract
digestive
cavity
{
{
False or pseudocoelom
(roundworms are
pseudocoelomates)
body
wall
pseudocoelo
m
digestive
tract
digestive
cavity
{
No coelom
(cnidarians , flatworms )
body
wall
digestiv
e
tract
digestive
cavity
{
Body cavity structure varies among phyla
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5. BIOLOGY DR ALSAQABI 2020BIOLOGY DR ALSAQABI 2012
Radial
symmetrycentral axis
plane of
symmetry
Bilateral symmetry
anterior
plane of
symmetry
posterior
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8. BIOLOGY DR ALSAQABI 2020BIOLOGY DR ALSAQABI 2012
Polyp
mout
h
lining of
gastrovascular
cavity
tentacle
gastrovascula
r
cavitycolumn
foot
body wall
mesoglea
Medusa lining of
gastrov
ascular
cavity
gastrovascular
cavity
tentacle
mouth
mesoglea
body wall
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9. BIOLOGY DR ALSAQABI 2020BIOLOGY DR ALSAQABI 2012
nuclei
trigger
trigger
filament
the cnidocyte
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