water vascular system
canal system
feeding current
circulating current
B. canal system
Leucosolenia
Sycon
Euspnongia
Grautia
calcarea
demospongia
anthozoa
hexactinellida
digestion
sexual reproduction
asexual reproduction
current circulation
free living, solitary, marine
free living, fresh water, solitary
free living, colonial, marine
Solitary, colonial, fresh water
choanocytes
scleroblasts
pinacocytes
amoebocytes
asconoid
syconoid
leuconoid
rhagon
diploblastic organisation
coelenteron
canal system
coelom
coelomata
acoelomata
metacoelomata
pseudocoelomates
calcarea
porifera
hexactinellida
demospongia
adhere
rotate
be ingested
none of these
porifera
gatropoda
coelenterata
ctenophora
trophocytes
thesocytes
desmocytes
archeocytes
Cliona
Hyalonema
Chalina
Euspongia
is well developed
is in the form of a network
is made up of several interconnected ganglia
is absent
Cartilage
Mesenchyma
Spicules and spongin fibres
Myonemes
Hyalonema
Tethya
Euplectalla
Pheronetna
Robert Grant
Trembly
Robert Brown
Ellias
corals
sponges
sea urchin
sea horse
cold water
sea water
sandy shore
brackish water
pinacocytes
thesocytes
choamocytes
scleroblasts
ostea
gastral cavity
gut
gullet
siliceous spicules
spongin fibres
collagen fibres
elastic fibres
admit water current
pass out water current
ingest food
excrete waste products
absorption of food material
excretion
reproduction
formation of spicules
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
amoebocytes
archeocytes
choanocytes
myocytes
sporozoa
mastigophora
porifera
coelenterata
gemma
gemmule
bud
bulbul
vaselike globular body
a central cavity
radial symmetry
choanocyts
nutrition
respiration
excretion
sexual reproduction