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24 Cards in this Set

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Anus
The posterior opening of the digestive tract
Cerebral Ganglion
One of the pair of nerve cell clusters that serve as a brain at the anterior end of some invertebrates
Cloaca
In animals, a common chamber into which the digestive, reproductive and excretory systems enter
Cuticle
In parasitic roundwords, a noncellular layer that protects the worm from the hosts digestive and immune system
Cyst
A resistant, thick-walled structure that encloses and protects a dormant organism
Elephantiasis
A condition of swollen lymphatic vessels in the limbs cause by a parasitic fliarial worm
Filarial Worm
One of the variety of parasitic roundworms that cause elephantiasis in humans and heartworm disease in dogs
Flame Cell
In a flatworm, a cell that collects excess body water and transfers it to the excretory system
Flatworm
The common name for any of the dorso ventrally flattened worms of the phylum Platyhelminthes
Fluke
A leaf-shaped parasitic flatworm
Hookworm
A parasitic roundworm that feeds on its hosts blood by cutting into the intestinal wall
Mastax
A muscular organ that breaks up food in fotifers
Pharynx
In flatworms, a muscular tube that leads to the gastrovacular cavity
Pinworm
Roundworm parasite taht lives in the lower intestine of humans but causes no serious disease
Primary Host
The host from whcih the adults of a parasite derive their nourishment and in which sexual reproduction occurs
Proglottoid
One of the many body sections of a tapeworm; contains reproductive organs
Rotifer
A small, aquatic invertebrate with a crown of cilia surrounding its mouth
Roundworm
A worm in the phylum Nematoda with a long, slender body that tapers at both ends, such as hook worms and pinworms
Schistosomiasis
A disease caused by a parasitic blood fluke of the genus Schistosoma
Scolex
A knob-shaped organ bearing hooks and suckers; lies at the anterior end of a tapeworm
Tapeworm
A parasitic flatworm that lives in the vertebrate intestine
Tegument
A continuous sheet of fused cells that covers the external surface of a fluke or tapeworm and protects the worm from the hosts digestive and immune system
Trichonosis
A disease caused by a parasitic roundworm of the genus Trichinella; characterized by muscle pain and stiffness
Uterus
A female reproductive structure where eggs are stored or fertilized or where development of the young occurs