Studied by 6 people
What domain, kingdom, and phylum are we currently studying?
Eukarya, animalia, platyhelminthes
bilateral symmetry
can be divided by a plane through their center in one place to form mirror images
radial symmetry
can be divided by a plane in several places to form mirror images
asymmetry
no symmetry
endoderm
inner layer, forms the digestive system
mesoderm
middle layer, forms the muscle, circulatory, excretory, and respiratory systems
ectoderm
outer layer, includes the nervous system and skin (outer coverings)
gastrulation
stage in embryonic development when blastula develops into gastula
cephalization
concentration of sensory and nerve cells at one end of the organism.
hermaphroditism
sexually reproducing
coelem
body cavity
acoelomate
animal lacking a formal body cavity
regeneration
a form of asexual reproduction
phylum for roundworms
nematoda
phylum for flatworms
platyhelminthes
phylum for segmented worms
annelida
all worms exhibit _____ symmetry
bilateral
associated with the planarian’s nervous system
ganglia
asexual reproduction can occur through the process of _____
transverse fission
a hermaphrodite is an animal that:
has both male and female parts
how does the dugesia obtain oxygen?
diffusion
Note 
Flashcard (48)