1/18
Looks like no tags are added yet.
Name | Mastery | Learn | Test | Matching | Spaced | Call with Kai |
|---|
No analytics yet
Send a link to your students to track their progress
ribbon worms
or proboscis worms
bottom
dwellers
mostly carnivores some scavengers
worms, clams, crustaceans
dangerous to fishing
attack clams and crabs
almost
no known predators
bilateral symmetry
very contractile
soft and unsegmented
flattened tube
eversible
proboscis in rhynchocoel
proboscis
food capturing; pressure enables it to shoot out
developed
digestive system
sexual dimorphism
hermaphroditic
external
fertilization
excretory
tubules or protonephridida “nephrons”
gas exchange
thru skin
brain
4 ganglia
longitudinal
nerve cords
bran contains
hemoglobin (oxygen reserve)
eyespots
present in pairs
can undergo
regeneration and asexual repreo by fragmentation