flatworm vocab

auricles

spike like projections on the side of the head of turbellarian that contain chemoreceptors

cerebral ganglion

a rudimentary bran

flame cell

a cell with a tuft of beating cilia that functions to bring water and waste into the canals of the protonephridia for eliminaton

ocelli

discs or pints of photoreceptors cells that allow the animal to respond to light

osmoregulators

animals that maintain the osmotic difference between ther body fluid and surrounding enviornment

penis fencing

reproductive behavior in hermaphroditic flatworms

photoreceptors

receptors that detect light

proglottids

indvidual sections of a tapeworm

scolex

anterior head region of tapeworm that contains suckers and hooks

statocysts

pits or closed vesicles containing tny calcareous statoliths that when stimulated inhibit muscular contraction on the side

strobila

region of a tapeworm just behind the scolex that contains reproductive structures called proglottids

summer eggs

a type of turbellarian eggs that posses a thin shell and hatches rapidly

totipotent

prossessn cellular plasticity in which a cell is capable of changing form and function

winter eggs

turbellarian eggs that possesses thick, resilliant shells, which are capable of withstanding cold and desiccaton