Download Unit 5 Notes #5 Roundworms Fill In - Mr. Lesiuk

Name: ______________________
Date: ________
Unit 5 Notes #5 Phylum __________________ (Nematoda) ________________
A) Body Plan:
-____________________ worms that are cylindrically shaped.
- Most are _____________________ but our focus will be on those that are
_____________________
Similarities to Platyhelminthes:
1.______________________________________
2. ________________________________(__________________ specialized to give
rise to muscle and various internal organs)
3. ___________________________________________(protection)
Differences:
- __________________________________________(mouth to anus).
-Between the mesoderm and the gut is a _______________________________called a
____________________________(“False Cavity”)
B) Continuity-____________________:
-________________________________________ in most roundworms.
- In the female, there is a pair of long, thin, coiled ____________that produce
thousands of __________ every day.
- In the male, there is one________________; its job is to produce ____________.
- After the eggs are fertilized, ______________________secrete a __________around
the egg so when they are released they will be ___________________
C) Various Systems:
1. _________________:
-_____________________ have a complete digestive system so materials move in one
direction only - _____________________________
-As food is pushed through the digestive tract, it is ____________________________
__________________________Undigested remains continue on through the tract
and are eventually eliminated out the __________.
2. Circulation & Respiration
- No circulatory or respiratory systems.
- Breathe and excrete metabolic ___________ through their ____________________
-_______________________________________________________________________
__________________________________________________________________ .
D) Advances of _________________________________________________________
1) They have a complete gut; _____________________________digestion.
2) They are ______________________ (___________________________) and they
_________________________________________.
3) They have a fluid filled body cavity (_______________________), which contains
their internal organs. The fluid in this cavity helps distribute materials and also
_______________________________________________________________________
_______________________________________________.
E) Roundworm Human Disorders
1) __________________________: “Guinea worms” form ulcerating blisters in
human skin.
2) ______________________: The “___________________________”_____________
________________________. This causes massive swelling and deformities. _______
worms are a close relative of Filarial worms. Most often _______________________
______________________ insects (mosquitoes).
Elephantiasis
Eye worms
3) ______________________________: “__________________”: Larvae invade
Human hosts by using hooks to burrow through the skin of bare feet to find their
way_______________________________. From there they ____________________
_______________________where they burrow into the air passages of the lungs.
They then travel to the throat, where they are swallowed and come to ____________
__________________________________.
- These parasites__________________
__________, leaving the host (human)
short of blood therefore____________
__________________ due to a
reduction in the number of red blood
cells.
Hookworm Mouth
Many such hookworms belong to the Genus “________________”
Bolus of
Ascaris worms
rectally passed
4) ____________________: -From the “Trichinella worm”
- ___________ host when __________________________________________________
- Set up in the _______________________
- After mating the worms can produce up to 1500 microscope ___________which
burrow into the host’s blood vessels.
- After traveling in the blood vessels they ___________________________ (pig,
_____________________etc) tissues (_______________________). There they form
_________________________