Download Phylum

COMPARISON OF INVERTS CHART
Phylum
“Name
Means:”
Examples
Symmetry
Digestive
System
Respiration/G
as Exchange
Pore Bearer
Sponges
None asymmetric
Choanocytes
(Collar cells)
trap food
particles from
water
Stinging
Celled
Jelly Fish
Corals
Sea
Anemone
Radial
Gastrovascular
Cavity (GVC)
Stationary
form = polyp
Floating
form =
medusa
With one
opening
Porifera
Cnidarian
(stinging
cells =
cnidocytes)
Nervous System
Reproduction
Gasses diffuse
directly from
environment
to & from cells
Water enters
thru pores,
into central
cavity and out
thru osculum
none
Asexual –
budding &
regeneration
Sexual hermaphroditic
Gasses diffuse
into/out of
body tissues
Gastrovascular
cavity
Nerve net
Asexual –
budding &
regeneration
Sexual hermaphroditic
With one
opening
Flatworms
Tapeworms
Flukes
Planaria
Bilateral
Highly
branched GVC
With one
opening
Gasses diffuse
into/out of
body tissues
Highly
branched GVC
With one
opening
Cephalization –
cluster of nerve
cells at anterior
end of worm
2 Nerve Cords
Asexual –
regeneration
Sexual –
hermaphroditic
(tapeworms make
proglottids that
house reproductive
organs and fertilized
eggs)
Roundworms
Hookworm
Ascaris
Trichinella
Guinea
Worm
Bilateral
Complete
digestive tract
– mouth 
anus
Gasses diffuse
into/out of
body tissues
(through
cuticle)
Pseudocoelom
distributes
nutrients
Simple ring of
nerve tissue at
anterior end with
a nerve cord
Dioecious –
separate sexes
Platyhelminthes
Nematoda
Internal Transport/
Circulation
Phylum
“Name
Means:”
Examples
Symmetry
Little rings
(segmented
worms)
Earthworms
Sandworms
Leeches
Bilateral
Annelida
(shell
produced by
a mantle)
Jointed Foot
Athropoda
Respiration
Gas Exchange
Internal
Transport/
Circulation
Nervous
System
Complete with
specialized
organs for
breakdown and
absorption
Gasses diffuse
into/out of
body tissues
Closed
Circulatory
System - Aortic
arches (hearts)
Surrounding
esophagus
Cerebral
ganglia
(“brain”)
and
ventral
nerve cord
Asexual
(regeneration) &
sexual
Some are
hermaphroditic
Gasses diffuse
into/out of
body tissues
Some have gills
(bivalves)
Closed cephalopods
Open –
Gastropods
Bivalves
Complex –
some
capable of
learning
Sexual –
Dioecious
(for most
species)
Open
Circulatory
system
Dorsal Heart
Simple
central
nervous
system
Metanephridia
remove liquid
wastes
Soft
Bodied
Mollusca
Digestive
system
(Jointed
appendages
with
exoskeleton)
Squid
Octopi
Nautilus
Clams
Mussels
Oysters
Snails
Slugs
Arachnids
(spiders)
Crustaceans
(crabs)
Insects
(butterfly)
Bilateral
Complete
with
specialized
organs for
breakdown
and
absorption
 Trachea
Bilateral with Complete
(insects)–
segmentaDigestive
tubules that
tion
tract Insects
carry gases
have
into/out of
Malpighian
body
tubules to
 Book Lungs
(spiders)
excrete liquid
 Gills
waste
Echinodermata
Sea Star
Brittle Star
Sea
Cucumber
Sand Dollars
Bilateral –
larva
Radial - adult
Primitive Gut –
turn stomach
inside out to
digest
Water Vascular
System
(no excretory
system for
liquid wastes)
Water Vascular
System
 Sexual –
Dioecious
 Pheromones –


(crustaceans)
Spiny
Skinned
Reproduction
Water
Vascular
System
Simple –
central
nerve ring
with
branches
chemicals to
attract mates
Internal
fertilization
Eggs have
waterproof
covering
Asexual –
regeneration
Sexual – mostly
dioecious