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47 Cards in this Set

  • Front
  • Back
5 characteristics of platyhelminthes?
Bilateral symmetry
Display cephalization
Dorsoventrally flattened
Genital apertures on ventral surface
what is cephalization?
Head development where sensory organs tend to be
what is Syncytial epidermis?
Multinucleated cell mass from fusion of cells
In what does Syncytial epidermis occur?
Monogeneans, Trematodes, and Cestodes
Muscular system of
circular, longitudinal, and oblique (transverse) fibers
Body is compact with no space between internal structures
The parenchyma
fills in any body space
what is parenchyma?
Solid mesodermal, supportive tissue
Some have eyespots to...
sense light and dark
what is platyhelminthese excretory system like?
two lateral canals with branches bearing flame cells (protonephridia)
Nervous system:
2 anterior ganglia connected to longitudinal and transverse nerve cords
what don't platyhelminthes have?
respiratory, circulatory, or skeletal system
Sexual Reproduction?
hermaphroditic and internal
which are free living and which are parasitic?
tubellarians are freeliving
Monogeneans, Trematodes, and Cestodes are parasitic
Secretions released to form mucus
Class Tuberllaria...example? what is on the side of their heads?
circular things in cross section of planaria/
gut diverticulum
Class Monogenea is mostly...
ectoparasites of aquatic animals
Class Monogenea has opisthaptor...
Posterior hook attachment
what is the first intermediate host and the final hostin Class Trematoda?
mollusk and vertebrate
Subclass Aspidogastrea, what animal?
Tread flukes
Ventral sucking surface composed of
Polyembryony and Anisogamy...
asexual and sexual
what subclass are the flukes in?
Body of Class Cestoda is...
What are the 4 segments of the body in class Cestoda?
1. Scolex (head)
2. Immature proglottid
3. Mature Proglottid
4. Gravid Proglottid
what does neotonic mean in class Cestodaria?
Larva may be able to reproduce without adult stages
what subclass is true tapeworms in?
In Order Pseudophyllidae what kind of scolex do they have?
Bothraited---shalow sucking grooves
In Order Pseudophyllidae where are the Gential aperature located?
what kind of scolex do Order Proteocephalata have?
Acetabulated scolex with apical gland (cup-like with a musclular wall)
gravid proglottid...looks
red and veiny
what are 2 adaptations of Class Turbellaria?
mucus prevents desication and
mucus helps them to escape predation
prohaptor----what class, and what is it?
Monogenea and anterior hook
what are auricles?
what genus is in class Mongenea?
what is life cycle of Class Monogenea?
eggs passed into environment
eggs hatch in water
gyrodactyloid (larvae released)
larval stage searched for host
matures in host
what is cecum and what class is it in?
blind pouch, Class Trematoda
lifecycle of Subclass Aspidogastrea
adults found in the pericardial sac of mollusca

egg or larvae passed to aquatic system through siphon

cotylocium swims around till brought in by incurrent siphon

cotylicium migrates to pericardial sac an matures into adult
Life cycle of Subclass Digenea.
germinal mass
what is the definitive host of Asian Liver flukes and what subclass are they in?
humans and Digenea
Since Digenea has such a specific life cycle...
they have reduced competeition between closely related parasites
what is one feature of Class Cestoda?
life cycle of subclass Cestodaria

eggs released into water through feces or burrowing through body wall

crustacean eats eggs and lycophore larvae hatch out

penetrate gut into hencocoel forming procercoid

develops into pleurocercoid form

crustacean eaten and pleurocercoid digested out

migrate to proper location
longer scolex and scolex with eyes
bothraited and acetabulated
echinococcus---def? int?
dogs are def and herb is int.
Genus Taenia? what order?
bladderworm ccyst.