Acoelomates Flashcards
All Acoelomates, Psuedocoelomates and Coelomates are of what developmental type?
Protostome (Second, mouth)
An Acoelomate has what kind of body cavity
none. it’s solid muscle supporting a digestive tube.
What is the only phyla that is an acoelomate?
Phylum Platyhelminthes
What is the common name for the only acoelomate phylum?
“flatworm” remember plat=flat
do flat worms have any type of cavity?
yes, a branched gastrovascular cavity.
What kind of digestion does Phylum Platyhelminthes have
Both intra- and extra-cellular digestion (as do Cnidarians)
What type of circulatory and respiratory systems do flatworms have?
they have neither at all
flatworms are members of grouping lophotrochozoa, what are the unifying features of members in this group?
Organisms must have a digestive system with 2 open ends, must have a coelom, must be triploblastic, and be bilateral
Group lophotrochozoa include _________
Flatworms, Rotifers, Ectoprocts, Brachiopods, Molluscs, and Annelids.
Flatworms have a nervous system consisting of ______
nerve chords with ganglia
What do Flatworms use for excretion?
Flame cells in networks called protonephridia
What are the classes of flatworms and their common names?
Turbellaria (includes Planaria), Trematoda or “flukes”, and Cestoda or “tapeworms”,
What class has eye spots and is capable of primitive learning?
Free living are parasitic?
Class Turbellaria which include Planaria. Free living, like all other semi intelligent animals
What class has a scolex?
Cestoda/”tapeworms”
what class has life cycles that include several hosts?
Trematoda or “flukes” as well as Cestoda or “tapeworms”
