Biology Animal Diversity
Terms
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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.