animal kingdom Flashcards
basis of classification
arrangement of cells
body symmetry
nature of coelom
patters of digestive, circulatory pr reproductive systems
cellular level of organisation
sponges
tissue level
coelenterates
ctenophores
organ level
platyhelminthes
aschelminthes
organ system level
annelids, arthropods, molluscs, echinoderms, chordates
incomplete digestive system in platyhelminthes
only one opening to the outside of the body
asymmetrical
sponges
radial symmetry
coelenterates
ctenophores
echinoderms
bilateral symmetry
platyhelminthes
diploblastic
ectoderm, endoderm and undifferentiated mesoglea
coelenterates
triploblastic
endoderm, mesoderm, ectoderm
platyhelminthes
coelomate
annelida
pseudocoelomate
aschelminthes
acoelomate
platyhelminthes
metamerism
earthworms have metameric segments
notochord
mesodermally derived
rod like structure
formed on dorsal side during embryonic development
porifera / sponges
marine (expect spongilla)
water transport or canal system
ostia > spongocoel > osculum
spongocoel and canals
lined by choanocytes/collar cells
digestion
intracellular
skeleton made of
spicules or sponging fibres
sexes
not separate (hermaphrodite)
asexually
fragmentation
sexually
formation of gametes
fertilisation
internal
development
indirect
sycon
scypha
spongilla
fresh water
euspongia
bath sponge
coelenterata (cnidaria)
aquatic, mostly marine
session or free swimming
cnidoblasts/cnidocytes (containing stinging capsules/nematocytes)
central vascular cavity with hypostome
digestion
intracellular and extracellular
corals have
calcium carbonate skeletons
two basic body forms
polyp: sessile, cylindrical
hydra, adamsia
medusa: free swimming, umbrella shaped
Aurelia/jelly fish
alternation of generation (metagenesis)
obelia
polyp > medusa (asexually)
medusa > polyp (sexually)
physalia
Portuguese man of war
adamsia
sea anemone
pennatula
sea pen
gorgonia
sea fan
meandrina
brain coral
ctenophora (sea walnuts/comb jellies)
exclusively marine
eight external rows of ciliated comb plates
bioluminescence
digestion
extracellular and intracellular
sexes
not separate
reproduction
only by sexual means
fertilisation
external
development
indirect
examples
pleurobrachia
ctenoplana
platyhelminthes (flatworms)
dorso ventrally flattened
mostly endoparasites
hooks and suckered on parasitic forms
flame cells (osmoregulation and excretion)
fertilisation
internal
development
through mang larval stages
planaria
high regeneration capacity
taenia
tapeworm
fasciola
liver fluke
aschelminthes (roundworms)
circular in cross section
free living, aquatic and terrestrial or parasitic
alimentary canal is complete
well developed muscular pharynx
excretory tube with excretory pore
sexes
separate (dioecious)
females are longer than males
fertilisation
internal
development
direct or indirect
ascaris
round worm
wuchereria
filaria worm