HELMINTHS MIDTERMS

36問 • 2年前

問題一覧

The best-documented parasitic disease known from the earliest times is undoubtedly that caused by the nematode worm __________

Dracunculus medinensis

__________ - flat worms, bilaterally symmetrical, leaf or ribbon-like almost symmetrical

Platyhelminthes

________ or flukes, leaf-shaped, unsegmented with alimentary tract.

Trematoda

_________ or tapeworms, segmented and without alimentary canal.

Cestoidea

_________ - round bodied or cylindrical worms, radial symmetry, usually sexes separate.

Nemathelminthes

_______ - contain all the roundworms of veterinary importance.

Nematoda

_________ - thorny headed worms, sexes separate

Acanthocephala

________ - highly evolved of all helminths. The group is of minor veterinary importance and leeches are the only parasitic members.

Annelida

4 Phyla of the Animal Kingdom

Platyhelminthes, Nemathelminthes, Acanthocephala, Annelida

Trematoda or Flukes - dorso-ventrally flattened, unsegmented and leaf-like - organs in _________, no body cavity - with _______, hooks or clamps

parenchyma, suckers

Trematoda or Flukes - alimentary canal present - branched excretory system with flame cells (___________) - monoecious except the __________ - direct or indirect life cycle

solenocytes, Schistosomatidae

________ - parasitic chiefly on aquatic vertebrates like fishes, amphibians and reptiles. direct life cycle. e.g. Gyrodactylus, Dactylogyrus, _______

Monogenea, Benedenia

________ - to this group belong all the species parasitic in domesticated animals. Indirect life cycle; one, two or more intermediate hosts. e.g. Fasciola, _______, Schistosoma

Digenea, Eurytrema

__________ - parasitic in or on fishes, turtles, mollusca or crustacea; none on domesticated animals. e.g. ________

Aspidogastrea, Aspidogaster

Important Notes and Structures of Flukes: ________ – also known as flame cells or solenocytes Brain – _______ ring _________ – bisexuals (except in schistosomes) _______ – primitive penis ______ – composed of seminal vesicle, prostate gland and cirrus

Excretory cells, circumesophageal, Hermaphroditic, Cirrus, Cirrus organ

Important Notes and Structures of Flukes: ______ – secretes yolk ______ – shell gland ______ – unclear function ______ – for attachment ______ – consist of mouth, pharynx, esophagus, and intestinal ceca: absent anus

Vitellaria, Mehli’s gland, Laurer’s canal, Suckers, Alimentary canal

General Life Cycle (Flukes): Egg → _______ → Sporocyst → _____ → ______ → Metacercaria → Adult

Miracidium, Redia, Cercaria

_______ – 2 suckers present – ventral away from the posterior end

diastome

______ – oral and ventral sucker present at each extremity

amphistome

________ – present oral sucker – absent ventral sucker

monostome

_________ – mouth opening located in the center of the ventral surface

gasterostome

__________ – body with constrictions which divides the body into 2

Holostome

_________ – presence of head collars

echinostome

_________ – unisexual

schistosome

________ – no tail

cercariaeum

_______ – most areas of the body are transparent

monostome

______ – oral sucker with anterior spine e.g. Echinostoma

xiphidiocercaria

________ – has collar spines

echinostome

_______ – forked tail – e.g. Schistosoma

furcocercous

______ – body is elongated and with granules

megarulous

_______ – possesses a lateral fin at 1/3 of its body length and a dorsoventral fin widen at about 2/3 of the length of its tail – e.g. Euryhelmis

parapleurolophocercous

______ – slender tail is a little longer than the body length and has dorsoventral finfold

pleurolophocercous

______ – has a stylet and a virgulate organ on its oral sucker

virgulate

_______ – long simple tail e.g. Fasciola

Leptocercous

_______ – dorsal, long, undulating fin fold e.g. Opistorchis

lephocercous

______ – very small and stumpy tail e.g. Paragonimus

microcercous

PHYSIO LEC MODULE 7

Reinhard Lowell Sabido · 48問 · 2年前

PHYSIO LEC MODULE 7