gemmules
spicules
spongin fibre
trychocysts
B. spicules
Hyalonema
Tethya
Euplectalla
Pheronetna
corals
sea pen
comb jellies
sponges
planula larva
amphiblastula larva
trochophore larva
glochidium larva
trophocytes
thesocytes
desmocytes
archeocytes
free living, solitary, marine
free living, fresh water, solitary
free living, colonial, marine
Solitary, colonial, fresh water
on the external body surface
line the gastric cavity
located between the outer and inner layers
in the mesodermal layer
admit water current
pass out water current
ingest food
excrete waste products
adhere
rotate
be ingested
none of these
Radial canal
Inhalant canal
Spongocoel
None of these
porifera
gatropoda
coelenterata
ctenophora
siliceous spicules
spongin fibres
collagen fibres
elastic fibres
parenchyma
alanula
redia
amphib las tula
digestion
sexual reproduction
asexual reproduction
current circulation
Scypha
Euspcmgia
Spongilla
None of these
calcarea
porifera
hexactinellida
demospongia
vaselike globular body
a central cavity
radial symmetry
choanocyts
cold water
sea water
sandy shore
brackish water
gemmulation
gemmation
regeneration
amphimixis
pinacocytes
thesocytes
choamocytes
scleroblasts
gemmules
spicules
spongin fibres
choanocytes
Planula
Parenchymula
Maggot
Kedia
Planula
Stomogastrula
Amphiblastula
Terogastrula
asconoid
syconoid
leuconoid
rhagon
Glass rope sponge
Venus flower basket
Boring sponge
Commercial bath sponge
diploblastic organisation
coelenteron
canal system
coelom
Robert Grant
Trembly
Robert Brown
Ellias
choanocytes
porocytes
pinacocytes
amoebocytes
water vascular system
canal system
feeding current
circulating current
is well developed
is in the form of a network
is made up of several interconnected ganglia
is absent
One mouth and innumerable exits
Mouth serves for both, ingestion and egestion
Innumerable mouths and one exit
The body encloses a single cavity the coeienteron