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orders
- cyclophyllidea
- pseudophyllidea
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adult morphology
scolex, neck, strobila
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chief neural ganglia, attachment structures
scolex
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muscular cups in cyclophyllideans
acetabulate suckers
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muscular protrusion of scolex, armed or unarmed
rostellum
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shallow grooves in pseudo
bothriate suckers
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proglottids form from stem cells in neck
strobilation
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most anterior proglottids are...
sexually mature
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most posterior proglottids are
gravid
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protandry
male organs form first
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regulates passage of oocytes
oocapt
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contributes to yolk and shell
vitelline gland
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vitelline glands in cyclo
compact, single
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vitelline glands in pseudo
small, scattered
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uterus in cyclo
ends blindly (gravid released)
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uterus in pseudo
ends in uterine pore (eggs released through)
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cestodes have this embryo
hexacanth
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cyclo embryo
round with many layers
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pseudo egg
oval, ciliated coracidium, with operculum
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tegument consists of
- syncynctum
- glycocalyx
- distal cytoplasm
- tegumental muscle
- cyton layer
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binds host enzymes, inhibits host trypsin, chymotrypsin, and pancreatic lipase
glycocalyx
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specialized microvilli
microtriches
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no nuclei, vesicles present, for mantainance
distal cytoplasm
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contains nuclei and organelles
cyton layer
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diffused in tegument
B vitamins
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actively transported through tegument
glucose
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digested on contact
enzymes intrinsic/not
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calcium, Mg, P, DNA, RNA, proteins and sugar for excretory products, supplying ions, and buffering
calcareous corpuscles
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