BIOL 1120
Fall 2020
For each of the phyla, fill out the chart with details/explanations about each of the characteristics. I have done Porifera as an example.
Examples
Porifera
Cnideria
Platyhelminthes
Nemotoda
Sponges
jelly fish,
corals,
tape worm
Body plan
and/or
symmetry
Asymmetric
(no
symmetry)
Respiratory
system
diffusion
Skeletal
system
Skeletal
elements
(spicules,
silica)
radical
symmetry
internal cavity
used for
respiration,
both cell
layers absorb
oxygen from
and expel
carbon dioxide
into the
surrounding
water
multicellular,
few tissues,
some
organelles
bilateral
symmetry
they have
pores that
allow oxygen
to enter
through their
body, oxygen
enters the
pores by
diffusion
multicellular,
don't have the
rigid skeletal
support
system,
usually
unsegmented
and
invertebrate
animals
Feeding and
digestive
system
Suspension
feeders;
amoebocytes
distribute food
internal body
cavity and
mouth, Food is
taken into the
gastrovascular
cavity,
enzymes are
secreted into
the cavity, and
the cells lining
the cavity
absorb the
nutrient
products
consists of
mouth,
pharynx, and
intestine, has a
gastrovascular
cavity
Circulatory
system
Flagella on
choanocytes
move water
through body
get oxygen
directly from
the water
surrounding
them
Nervous
system
None
nerve net
has a central
nervous
system, and a
peripheral
nervous
system
Excretory
system
Diffusion;
pores
has a digestive
cavity called
the
coelenteron,
has a single
mouth
opening
through which
food/prey
enters and
waste is
expelle
rudimentary,
mouth is used
to expell waste
BIOL 1120
Fall 2020
Arthropoda
Molluska
Annelida
Echinodermata
Chordata
insects,
spiders
bilateral
symmetry
snail
bilateral
symmetry
leech,
earthworm
bilateral
symmetry
exoskeleton,
chittin
move via
peristalsis