cold water
sea water
sandy shore
brackish water
A. cold water
porifera
gatropoda
coelenterata
ctenophora
corals
sponges
sea urchin
sea horse
Cliona
Hyalonema
Chalina
Euspongia
on the external body surface
line the gastric cavity
located between the outer and inner layers
in the mesodermal layer
gemmulation
gemmation
regeneration
amphimixis
choanocytes
porocytes
pinacocytes
amoebocytes
protozoans
flagellates
choano flagellate
ciliates
absorption of food material
excretion
reproduction
formation of spicules
coelomata
acoelomata
metacoelomata
pseudocoelomates
siliceous spicules
spongin fibres
collagen fibres
elastic fibres
trophocytes
thesocytes
desmocytes
archeocytes
pinacocyte � choanocyte � osculum
osculum > spongocoel � ostia
ostia > spongocoel � osculum
osculum � ostia > spongocoel
Leucosolenia
Sycon
Euspnongia
Grautia
calcarea
demospongia
anthozoa
hexactinellida
planula larva
amphiblastula larva
trochophore larva
glochidium larva
ostea
gastral cavity
gut
gullet
Robert Grant
Trembly
Robert Brown
Ellias
choanocytes
scleroblasts
pinacocytes
amoebocytes
Scypha
Euspcmgia
Spongilla
None of these
gemmules
spicules
spongin fibres
choanocytes
is well developed
is in the form of a network
is made up of several interconnected ganglia
is absent
calcarea
porifera
hexactinellida
demospongia
porocytes
myocytes
choanocytes
none of these
pinacocytes
thesocytes
choamocytes
scleroblasts
Hyalonema
Tethya
Euplectalla
Pheronetna
gemmules
spicules
spongin fibre
trychocysts
cold water
sea water
sandy shore
brackish water
diploblastic organisation
coelenteron
canal system
coelom
gemma
gemmule
bud
bulbul
water vascular system
canal system
feeding current
circulating current