Worms Flashcards
What phyla are flatworms?
Plathelminthes
What phyla are roundworms?
Nematoda (Ashelminthes)
What phyla are annelids?
Annelida (segmented worms)
Example of flatworms:
planarians, marine flatworms, tapeworms
Example roundworms:
roundworms, vinegar eels, pinworms, hookworms
Example annelida
earthworms, leeches, brsitleworms, sandworms
All 3 worms have how many germ layers?
3
All 3 worms are __lateral
bilateral
What is the only type of worm that is segmented?
annelids
Body cavity of flatworms
absent
Body cavity of roundworms
pseudomcoelem
Body cavity of annelids
true coelem
Regeneration is only in what type of worm?
flatworms
Do worms have cephilization?
yes
How do flatworms move?
the glide, twist, and turn with cilia
How do roundworms move?
with a thrashing motion
How to annelids move?
peristalsis or muscles
All worms have what type of skeleton?
hydrostatic
Flatworms have how many body openings for digestion and excretion?
one
____ cells remove wastes in flatworms
flame
Roundworms have how many body openings for digestion and excretion?
2
In roundworms, how is waste excreted?
through body walls
Annelids have how many body openings for digestion and excretion?
2
In annelids, how is waste removed?
through nephridia
What is the only phyla of worms that have a circulatory system?
annelids
Describe the circulatory system in annelids
blood is circulated through blood vessels in closed circulatory system
How do flatworms and roundworms respire?
through skin. they have no respiratory organs
How to annelids respire?
skin; aquatic annelids have gills
Can flatworms reproduce sexually, asexually, or both?
both
Can roundworms reproduce sexually, asexually, or both?
sexually only
Can annelids reproduce sexually, asexually, or both?
sexual only
How to flatworms reproduce asexually?
through fission
Describe sexual flatworms and annelids
hermaphrodites (only some annelids are hermaphrodites)
What is the eyespot on a flatworm for?
sees light & dark
What is the head on a flatworm for?
brain-like ganglia located here
What is the gastrovascular cavity on a flatworm for?
transports food
What is the mouth on a flatworm for?
food enters & waste exits
What is the pharynx of a flatworm for?
“straw” sucks up food; extends from mouth during feeding
What are flame cells for?
removes excess water and nitrogenous wastes
Planarians are in what class?
Turbellaria
Planarians live where?
freshwater-under leaves and rocks
Planarians feed on what
dead organisms
Are Planarians parasitic?
no they are free-living
Can planarians regenerate?
yes
What is the solex of a tapeworm?
head region.
What are proglottids of a tapeworm
individual sections of the worm. they contain 100,000 eggs each
Flukes are in what group?
flatworms
What class are flukes under?
Trematoda
Flukes live where?
in digestive tracks or liver
Liver flukes live where?
in liver
Blood flukes feed off of what?
blood cells & bodily fluids
Ascaris are in what group?
roundworm (nematodes)
Ascaris live in what?
intestines
Ascaris feed off what?
blood
How are ascaris eggs ingested?
from dirty hands or unwashed vegetables contaminated with feces
Ascaris eggs hatch where and enter where?
eggs hatch in intestines and enter bloodstream
Ascaris larval worms bore into where?
lungs
How to larval ascaris move to intestines?
they are coughed up from the lungs and swallowed
Trichinella are in what group?
roundworms
Trichenella bore in what tissue?
muscle
Trichenella can also live in what type of organ?
intestines
what to trichinella cause?
painful cysts
How does one get trichinella?
from ingesting cysts in undercooked/raw meat (usually pork)
Hookworms are in what group?
roundworms
Where to hookworms live?
in intestines
Eggs are deposited on _____ for contaminated wastes
soil
How to hookworms infect their host?
they burrow into feet or exposed skin
Hookworm larvae travels through ________, into the _____
bloodstream; lungs
What happens after hookworm larvae reaches the lungs?
it is coughed up and swalloed
Hookworms attatch to where to mature?
intestinal wall
What is the setae in earthworms?
bristels for movement located on the ventral side
What is the clitellum in earthworms?
enlarged segment, secretees mucus, contains the reproductive structures
What is the nephridia in earthworms?
collects and removes wastes
What is the crop in earthworms?
temporary food storage
What is the gizzard in earthworms?
grinds food
Instead of a nose, earthworms have what?
chemoreceptors