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36 Cards in this Set
- Front
- Back
Parasitic Flatworms
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Flukes and tapeworms
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Free-living Flatworms
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Planarians
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Triploblastic
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Three germ/tissue layers
(endo, ecto and mesoderm) |
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Cephalization
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has a head
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Acoelomate
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No true body cavity
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Anus
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Posterior opening of digestive tract.
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Cerebral ganglion
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One pair of nerve cell clusters that serve as a brain at the anterior end of some invertebrates.
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Cloaca
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common chamber into which the digestive, reproductive, and excretory systems enter.
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cuticle
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noncellular layer that protects worm from the host's digestive and immune systems.
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cyst
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a resistant, thick-walled structure that encloses and protects a dormant organism
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Elephantiasis
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a condition of swollen lymphatic vessels in the limbs caused by a parasitic filarial worm.
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eyespot
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A localized region of pigment in some invertebrates and protozoa that detects changes in the quantity and quality of light.
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Filarial worm
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One of a variety of parasitic roundworms that cause elephantiasis in humans and heartworm disease in dogs.
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Fission
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A type of asexual reproduction in which the organizm splits in two and regenerates the parts missing on each new half to produce two whole organisms.
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Flame cell
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A cell that collects excess body water and transfers it to the excretory system.
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Flatworm
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The common name for any of the dorso-ventrally flattened worms of the phylum Platyhelminthes, such as a planarian, fluke, and a tapeworm
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Fluke
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A leaf-shaped parasitic flatworm
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Heartworm disease
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A disease of the heart and large arteries in dogs caused by a filarial worm.
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Hookworm
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A parasitic roundworm that feeds on its host's blood by cutting inot the intestinal wall.
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Intermediate host
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The host from which the larvae of a parasite derive their nourishment.
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Mastax
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A muscular organ that breaks up food in rotifers.
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midbrain
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The section of the brain stem, which acts as a relay between the cerebrum and cerebellum.
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Olfactory nerve
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The nerve that carries impulses from olfactory receptors in the nasal passage to the brain.
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Pharynx
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A muscular tube that leads to the gastrovascular cavity.
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Pinworm
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roundworm parasite that lives in the lower intestine of humans but causes no serious disease
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primary host
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The host from which the adults of a parasite derive their nourishment and in which sexual production occurs
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proglottid
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One of the many body sections of a tapeworm; contains reproductive organs.
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Rotifer
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A small, aquatic invertebrate with a crown of cilia surrounding its mouth.
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Roundworm
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A worm in the phylum Nematoda with a long, slender body that tapers a both ends, such as hookworms and pinworms.
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Schistosomiasis
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A disease caused by a parasitic blood fluke of the genus Schitosoma
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Scolex
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A knob-shped organ bearing hooks and suckers at anterior end of a tapeworm
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Swimmer's itch
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A condition characterized by minor skin irritation ans swelling caused by a small, brown fluke that usually lives in fresh water
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Tapeworm
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A parasitic flatwom that lives in the vertebrate intestine.
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Tegument
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Protective sheet of fused cells that cover external surface of a fluke or tapeworm. Protects worm from host's digestive and immune systems.
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trichinosis
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A disease caused by a parasitic roundworm of the the genus trichinella causes muscle pain and stiffness
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Uterus
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A long, coiled tube used to store eggs in flukes.
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