Flatworms

Question 1

what are some features of phylum platyhelminthes

Answer 1

bilaterally symmetrical
dorsoventrally flattened
acoelomate
digestive tract with single opening or absent
most species are hemaphrodites

Question 2

what are some classes of platyhemelithes

Answer 2

turbellarians - free living flatworms
trematodes - flukes
cestodes - flatworms

Question 3

what are some features of turbellarians

Answer 3

mostly predators or scavangers
mostly marine and cryptic and benthic
some head projections - tentacles or oracles

Question 4

what are some cell types of turbellarians

Answer 4

cilliated epidermis
gland cells - slime and other stuff
duo gland system - glue and release
spicules - structural

Question 5

what are some features of the turbellarian gut

Answer 5

can be simple bag gut
can also be branched in larger animals
polycaldida - multiple branches
tricaldida - three branches

Question 6

what are some forms of turbellarian pharnyx

Answer 6

simple
plicate - folded tube
bulbous - reversible muscular bulb

Question 7

what are some other features of turbellarians

Answer 7

simple epidermal nerve system
simple eye
asexual fission or hermaphroditic reproduction

Question 8

what are some features of trematoda

Answer 8

parasitic
flukes
anterior mouth
noncillated exterior
gut with single opening, one or two branches

Question 9

what are the two orders of trematoda

Answer 9

monogenea
single host
parasite of fish
posterior adhesive organ

digenea
mostly endoparasites
can be a problem to livestock and humans
multiple hosts

Question 10

what are some features of cestoda

Answer 10

parasitic
life cycle involves intermediate host
outerlayer non cilliated
absent gut
developed attachment organs
many parcels of eggs creating apparently segmented body