Roundworms!
The Facts …
Body symmetryReproductionMovementFood-
Bilateral
Sexual
thrashing from side to side
Parasites.
Called Round worms because
their bodies are
shaped like round tubes
Males have rounded hooked ends
Females have straight heads
Worms are the simplest animals that have a
_____Brain_________.
Their brain is more of a cluster of nerve
tissue.
Porifera and Cnidaria had
Two way digestive stystems.
Rondworms have a
1 way
system.
ANUS
digestive
MOUTH
Food enters the worms MOUTH, and exits through the ANUS
Worms do not have eyes, ears or noses. How can
they tell what is around them?
__________________________________________
__________________________________________
___They have sense organs that can detect light
and touch. They can detect the vibrations from
footsteps.__________________________________
__________________________________________
__________________________________________
Nematodes are the most abundant animals on
earth, with over _____20,000_________
species identified. They can live in almost any
environment on earth.
•Hookworm (Ascaris)
lives in the small
intestines of infected
humans
•Eggs are passed in the
feces
•The eggs mature in soil
and become a larvae
•The larvae burrow into
the foot or can be
ingested
•Gastrointestinal
Symptoms include blood
loss
•Medication can clear up
any infection