This parasitic roundworm forms cysts in the skeletal muscle of pigs and other animals

Body plan for having a hollow, fluid-filled cavity; body cavity is partially lined with mesodermal tissue

Separate male & female individuals

Two openings for food and waste products; mouth to anus

posterior chamber of digestive tract, opening for digestive, excretory, & reproductive systems

muscles that work against each other, contracting & relaxing

thick, non-living outer layer of many invertebrates

Which of the following is not an advantage of having a body cavity?

most abundant animals on earth, parasitize nearly all plants & animals, can be free-living, found throughout the world in all environments

anterior end curves, 9mm-11mm, large plates in mouth cut intestinal wall, suck blood causing anemia, larvae in soil enter feet

causes trichinosis, enters the body through eating undercooked pork or wild game infected with larvae

most common parasitic roundworm, infects 25% of world's population, adults live in large intestine, females leave body at night to lay eggs

adults live in lymphatic system, larvae transmitted by mosquitoes, causes elephantiasis, dog heartworm

most common filarial worm in US, infects canids, cats, ferrets, sea lions, & other mammals, transmitted by mosquitoes

horsehair worms, .5mm-1mm diameter x 1m length, free-living adults, juveniles cause terrestrial arthropod host to go into water

named from ciliated organs around lobes on head that look like spinning wheels, mostly freshwater, found in pond water

How are Ascaris, porkworms, & pinworms transmitted?

What organism acts as an invertebrate vector species & intermediate host for filarial worms like heartworms?

invertebrate that carries a disease causing organism from one host to another

system that runs parallel to blood vessels; removes fluids from organs & muscles; removes infectious agents from body

host species in which a parasitic larvae undergoes a portion of development

host species in which parasite matures into an adult & is able to sexually reproduce

host's cells that are reprogrammed to nourish & protect growing parasitic worm larvae

prevents blood from clotting

low red blood cell count; causes fatigue, weakness

How do hookworm larvae enter the body?

blockage of lymphatic system causes extreme swelling of appendages; primarily in tropical regions

How long can heartworm larvae live in a dog's body before entering a mosquito?

Which of the following is not a likely host for a larval horsehair worm?