Flat Worms!

Platyhelminthes
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Terms in this set (26)
Platyhelminthes
Phylum of flatworms
Turbellaria
Class of free living flat worms (planarians & marine flatworms).
Image: Turbellaria
Cestoda
Class which includes tapeworms. These animals are hermaphroditic, lack a digestive tract, and do not have a body cavity
Image: Cestoda
Trematoda
Class which includes flukes, which are parasitic flatworms that infect the blood vessels, gastrointestinal tract, lungs, or liver
Image: Trematoda
Free living
organisms that survives on its own (not parasitic)
Endoparasitic
a parasite that lives in organs or tissues of its host
Image: Endoparasitic
Ectoparasitic
a parasite that lives on the exterior of its host
Coelom
body cavity lined with mesoderm
Coelomate
Animal possessing a true coelom (body cavity lined completely by mesoderm).
Image: Coelomate
Acoelomate
no body cavity
Image: Acoelomate
PseudocoelomateAn animal whose body cavity is not completely lined by mesodermCephalizationConcentration of sense organs and nerve cells at the anterior end of an animalAnteriorfront endPosteriorback endDegeneration of body systemloss or reduction in sizeGangliaCollections of nerve cell bodiesScolexthe anterior end of a tapeworm, bearing suckers and hooks for attachment.Pharynxmuscular tube near the mouth on a tapewormhermaphroditean organism that has both male and female reproductive organsbilateral symmetryBody plan in which only a single, imaginary line can divide the body into two equal halves.NematodaPhylum of roundwormsAnnelidaphylum of segmented wormsProtostomiaa clade of bilaterally symmetrical animals in which the first opening of the blastula becomes the mouthDeuterostomesAnus develops near blastopore Echinodermata, Chordata, Radial cleavage Daughter cells sit on top of previous cells. Mouth develops last.Dorsalpertaining to the backVentralToward the belly