Pseudocoelomates
Biological Sciences 2011l with Spears at Florida State University
About this deck
By: Ross Sholota
Created: 2011-05-31
Size: 25 flashcards
Views: 14
Created: 2011-05-31
Size: 25 flashcards
Views: 14
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Pseudocoelomate
False body cavity
derived from blastocoel
not enclosed entirely by mesoderm
Cavity in the pseudocoelomate
hydrostatic pressure from fluid
fluid also suspends organs
fluid also contains mesenchyme cells
7 phyla
Rotifera
Acanthocephala
Gastrotricha
Nematoda
Nematomorpha
Kinoryncha
Ectoprocta
Digestive system
complete gut
separate mouth and anus
Eutely
fixed number of cells
pedal glands
secrete an adhesive for substrate attachment (foot)
mastax
a muscular pharynx with chitinous jaws (trophi)
-trunk
trophi
chitinous jaws
coronal cilia
sort out large particles that are unsuitable for filter feeders
reproduction
dioecious
unisexual - parthenogenetic
Parthenogenesis
unisexual reproduction
female only
produces diploid cells without fertilization
Phylum Gastrotricha
-lack corona and mastax
-hermaphroditic
-use cilia for locomotion
Phylum Cycliophora
symbiont living on mouthparts of clawed lobsters
Phylum Acanthocephala
-spiny headed worms
-eversible probocsis with spines
-important endoparasites in fish, birds, and mammals
-intermediate insect or crustacean host
Phylum Entoprocta
-usually marine
-cup shaped body
-circular crown of tentacles for feeding
-stalked body and sessile
-gut is u-shaped
-mostly colonial
Bryozoan
old name for Ectoprocta
zoecium
-in Ectoprocta
calcareous, gelatinous, or chitinous cuticle of chambers
operculum
trap door on the zoecium
zooid
individual inside of one zoecium
lophophore
feathery tentacles on a circular crown for filter feeding
avicularia
polymorphic zooids
defense
beak-like
Phylum Nematoda
round worms
virtually all habitats
most are free living
longitudinal muscles in Nematoda
only four bands marked off by four inward projections hypodermal cords
(rotifers) eggs that develop during the summer are __________ and develop ______________
amitic ; parthenogenetically
Trichinosis
caused by a parasitic nematode
by eating undercooked meat
About this deck
By: Ross Sholota
Created: 2011-05-31
Size: 25 flashcards
Views: 14
Created: 2011-05-31
Size: 25 flashcards
Views: 14
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.
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“I have used this website for three exams, and I see a huge difference in my test results.”
Naj
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