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36 Cards in this Set

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