Cnidaria
Biological Sciences 2011l with Spears at Florida State University
About this deck
By: Ross Sholota
Created: 2011-05-23
Size: 57 flashcards
Views: 16
Created: 2011-05-23
Size: 57 flashcards
Views: 16
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Cnidocytes
-cell unique to cnidarians
3 main classes of cnidaria
1.hydrozoa
2.schyphozoa
3.anthozoa
level of organization
tissue level
2 main germ levels
1.epidermis
2.gastrodermis
layer inbetween epidermis and gastrodermis
mesoglea
symmetry
radial
2 main body types
medusa and polyp
only in polyp form
class anthazoa (corals and anemones)
dominant medusa, inconspicuous polyp form
class scyphozoa (jellyfish)
dominant polyp, inconspicuous medusa form
class hydrozoa (man-o-war, fire coral, hydra)
internal cavity - for digestion
GVC- GastroVascularCavity
Gastro Vascular Cavity
-internal cavity for digestion
-also serves for circulatory function
organelles in all cnidarians
nematocysts
nematocyst
organelle in all cnidarians
used for anchorage, defense, and capture of prey
stinging capsules
housing cell for nematocysts
cnidocyte
condition of having 2 germ layers
diploblastic
mesoglea is thin in the _____ form and thick in the _______ form
polyp ; medusa
The gastrovascular cavity functions as a:
hydrostatic skeleton
hydrostatic skeleton
cells within body wall and tentacles contract... for locomotive purposes
cnidarians are ____________
carnivorous
digestion is partially ___________ and partially _____________
intracellular and extracellular
also within the GVC
most intracellular digestion occurs in:
vacuoles in the cells of the gastrodermis
products of digestion pass to the rest of the body via
diffusion
respiration and diffusion take place through:
diffusion
nervous system/ sensory
nerve net / plexus
plexus
another name for the nerve net
most hydrozoans (except for _____) exist in the polyp and medusa stages
hydrozoa
most polyps are _______ which are responsible for the capture and ingestion of prey
gastrozooids
gastrozooids
responsible for the capture and ingestion of prey
gonozooids
responsible for reproduction
produce sexual medusae
sexual medusae produce:
gametes; eggs and sperm
Larvae of the phylum cnidaria
planula
polymorphism
having many forms
dimorphic
having two forms
gastrozoids and gonozooids
the _________________ is an example of polymorphism because it is a colony of gastrozooids designed for feeding
Portuguese man-o-war
dactylozooids
defense cells
pneumatophore
flotation cells
free swimming larvae (planula) in the scyphozoa class attach to the substrate and produce a polyploid stage:
scyphistoma
transverse fission
cell division
in scyphistoma
process of transverse fission in scyphistoma
strobilation
strobila
cells resulting from strobilation
ephyrae
immature medusae
class staurozoa
polyp is solitary and has 8 extensions
the top resembles a medusa
no medusa stage
Class Cubozoa
predominately medusa
cube shaped bell
very dangerous
the gullet (pharynx) of the anthozoa class has ciliated grooves called:
siphonoglyphs
siphonoglyphs
ciliated grooves in class anthozoa leading to the GVC
maintains water current
GVC in anthozoa is divided into
septa
soft corals are made up of a skeleton of
gorgonin
hydranths
polyp colony
aboral
opposite end of the mouth
2 types of muscle tissue
radial
longitudinal
extracellular digestion
via enzymes in the GVC
intracellular digestion
via phagocytosis
anthozoa - symbiosis with?
zooxanthellae
acontia
threads of nematocysts and glands - occurring in anemones
exumbrella
top of bell/dome of a medusa
subumbrella
bottom of bell/dome of a medusa
About this deck
By: Ross Sholota
Created: 2011-05-23
Size: 57 flashcards
Views: 16
Created: 2011-05-23
Size: 57 flashcards
Views: 16
About StudyBlue
STUDYBLUE makes things that make you better at school.
Things like online flashcards with photos and audio.
Things like personalized quizzes and friendly reminders about when (and what) to study next.
Think of it as a digital backpack™: access to all of your study materials online and on your phone.
STUDYBLUE exists to make studying efficient and effective for every student, for free. Join us.
“I have used this website for three exams, and I see a huge difference in my test results.”
Naj
Naj