Flatworms
how does having bilateral symmetry help flatworms?
allows more efficient movement
parasitic flatworms feed on
blood and other body tissues
are cestodes parasitic?
yes
regeneration-
body parts that are missing due to damage or predation can be regrown
form a new organism with missing body part
cestodes (tapeworms) have
suckers and hooks to attach to the intestinal lining of a host (cow or human)
where do flatworms live
in marine, freshwater, or moist land
if parasitic flatworms lack a digestive system
they absorb directly through their body walls
or completely digestive food eaten by host
tubelike muscular organ system is their
pharynx (mouth)
Turbellarians have ...... that can detect presence/absence of light
eyespots
coelomates
fluid filled cavity surrounded by mesoderm
true coelom present
mesoderm split into 2 layers enclosed woth cavity
cephalization means
nerve center is organized into the anterior end (head end)
how do flatworms breathe
through diffusion
auricles
sensors on their head that allows them to sense chemical changes in the environment
Trematodes (flukes) that
require 2 hosts to complete it's life cycle
pseudocoelomates
cavity between body wall and alimentary canal lined by mesoderm
false body cavity
feed on dead or
slow moving organisms
are turbellarians parasitic?
no
outer mucus covering enables them to stick tightly to surface
true or false
true
trematodes (flukes) are parasites that infect
blood and body organs of hosts
acoelomates
no body cavity
acoelomates
no body cavity
are trematodes parasitic?
yes
do flatworms produce both eggs and sperm?
yes, they are hermaphrodites
Cestodes(tapeworms) are parasites that adapt to life
in the intestines of their host