Phylum
Nematoda
The following questions will
help you to review the material from the lecture, lab as well as the
text.
-
What is a pseudocoelom? How
does
it differ from a coelom?
-
Characterize the phylum
Nematoda.
-
In what kind of habitat would
you expect to find roundworms?
-
How many roundworms have been
identified? How many are expected to exist?
-
Briefly outline a cross
section
of a nematode worm. What are the major visible features in such a
cross
section? Label them and briefly describe the function of the visible
parts.
-
The cuticle is an important
structure
in roundworms. Briefly describe its composition and role in the life
cycle
of the animal (especially the parasitic species).
- This
taxon is considered to be more closely related
to Arthropods than to other worm phyla. Why is that?
-
How would you characterize
the
pattern of movement in a typical roundworm? How does a roundworm
move?
How would you explain the movement pattern based on the types of
muscle
groups one finds in this phylum?
-
What kind of sensory stimuli
do
roundworms respond to?
-
Briefly describe the
structure
of the digestive system in round worms. How does it differ from
previous
phyla covered in this course?
-
Do roundworms have an
advanced
nervous system? Explain.
-
Describe the structure and
function
of the reproductive systems in a male as well as a female roundworm.
-
Most, but not all, roundworms
are dioecious. Explain.
- Know
the anatomy of the Ascaris
worm.
-
Compare and contrast a cross
section
of a male and female Ascaris worm in regards to their
reproductive
system.
-
Discuss the parasitic aspects
of the phylum Nematoda. Use examples.
-
Use the Ascaris
worm to illustrate the complexity of the life
cycle of a parasitic
roundworm.
-
Give examples of other
parasitic
roundworms and their effect on human society.
-
What kind of measures can our
society take to try to curtail the number of infected individuals?
-
How is the Trichinella
worm transmitted? What kind of damage can the worm cause in an
infected
individual?
-
What is the connection
between
microfilariae and the disease referred to elephantiasis.
-
What is a vector? What is the
vector of the disease elephantiasis?
-
Why is the Guinea
worm a problematic nematode?
