paired nerve cords, ganglia
nervous system
incomplete, only one opening
digestive system
absent
circulatory system
simple, only through diffusion in body wall
respiratory system
flame cells
excretory system
Flame cells
defining characteristic, cell in the tubule
protonephridia
à network of tubules throughout the body w/ openings to the environment
Protonephridia
where are flame cells located
most are monoecious
reproductive system
Cross fertilization
sexual reprotduction
Regeneration, Fission
asexual reproduction
Class Turbellaria
(free-living, planarians) à habitat: marine (colorful), freshwater & moist environments
Class Turbellaria
à feed on smaller animals à at times they secret, digestive juices onto their prey)
Ectoparasite
ticks, mites, lice
Endoparasite
flukes, tapeworms
Zoonotic disease
infectious diseases transmitted between species from animals to human vv
Intermediate host
harbors the immature parasite
Definitice host
harbors the mature pest, ready for sexual reproduction
Monogenea
generation of animal from 1 ova
one
mono means
generation
genesis means
Gyrodactylus elegans
gives birth to a single live young
suckers, clamps, hooks, spines
Monogeneans attachment organs
Juvenile stage
ives in secondary or intermediate hosts - e.g., smaller animals the primary hosts eats
Adult stage
- lives in primary hosts - e.g., squids, octopus, fish, amphibians, reptiles, whales, etc
Indirect life cycle
life cycle of monogeneans
Trematoda
includes Schistosoma
Schistosoma sp
endoparasitic flukes, that causes Bilharziasis
sucker
attachment organs of Trematoda
penetration
the posterior tail is lost during what?
S. japonicum, mansoni, intercalatum, meckongi
intestinal schistosoma
S. haematobium
urinary schistosoma
Fresh wather snails
Intermediate hsot of trematoda
humans
definitice host of Schistosoma
mimicking cell surface proteins of host
can evade the immune systems of snails & humans by
Cestoda
endoparasitic tapeworms
suckes, hooks
attachment structure of cestoda
strobila, with many proglottids
repeating units of cestoda
no digestive tracts
(absorbs nutrients directly from the host’s environment
no digestice tracts
inidicator of parasitic lifestyle
in any organs
larval stage of cestoda, where are they found?
in gastrointestinal tracts
adult stage of cestoda, where are they found?
Taenia solium, humans definitive host
pork tapeworm, and host
Taenia saginata, Humans intermediate and definitive host
beef tapeworm, and host
Taenia asiatica, humans definitive host
asian tapeworm