Exam 3 Parasitology

Plateyhelmithes (flatworms)

what phylum do cestodes belong to

Acoelomate

what type of body cavity do cestodes have

Intestines or vertebrates

where do adult cestodes typically live

digestive, respiratory, circulatory, and skeletal systems

what major organ systems do cestodes lack

scolex, neck, and strobila

what are the 3 main body regions of a cestode

attachment to host intestinal mucosa

what is the function of the scolex

four cup shaped suckers on the scolex

what are acetabula

slit like grooves used for weak attachment

what are bothria

growth region where proglottids are produced

what is the function of the neck in cestodes

segments that make up the strobila

waht are the proglottids

immature, mature, gravid

name three types of proglottids

what is the tegument and its function

outer covering that absorbs nutrients and is a drug target

what structures increase surgave area for absorption in cestodes

microtriches and digitioform folds

Hermaphroditic

are cestodes monoecious or dioecious

self, reciprocal, and cross fertilization

three types of fertilization in cestodes

anapolysis

release of eggs individually into feces

apolysis

release of gravid proglottids

function of flame cells

maintains hydrostatic pressure and assist in excretion

key feature of order cyclophyllidea scolex

4 suckers, may have rostellum with hooks

key feature of order pseudophyllidea scolex

2 bothria

what type of effs do pseydophyllidean tapeworms produce

operculated eggs with coracidium

what is the infective stage of pseydophyllidean tapeworms of humans

pierocercoid larva

what is the largest human tapeworm

Diphyllobothrium latum

what deficiency is associated with D. latum

B12 deficiency

differences between T.solium and T. saginata

T. solium has hooks and can cause cysticercosis; T. saginata lacks hooks