Title: Bio Ch. 34 ~ Flatworms, Roundworms, and Rotifers Flashcards | Quizlet
Headings: Bio Ch. 34 ~ Flatworms, Roundworms, and Rotifers
Bio Ch. 34 ~ Flatworms, Roundworms, and Rotifers
Terms in this set (112)

Content: Bio Ch. 34 ~ Flatworms, Roundworms, and Rotifers Flashcards | Quizlet
112 terms
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Bio Ch. 34 ~ Flatworms, Roundworms, and Rotifers
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Terms in this set (112)
cuticle
protective noncellular layer on most roundworms
Platyhelminthes
phylum of flatworms
filarial
roundworm parasite that blocks the host's lymphatic system, causing swelling
Ascaris
genus of roundworm that lives in host's intestines where it absorbs digested food
tegument
outer layer in flukes and tapeworms that protects them from the host's immune system
Nematoda
phylum of roundworms
cloaca
common chamber into which the digestive, reproductive, and excretory chambers empty
pharynx
muscular tube through which food is ingested in planaria
scolex
"head" of the tapeworm
pseudocoelomate
have a hollow, fluid-filled cavity lined with mesoderm on the outside and endoderm on the inside
Trichinella
genus of roundworm whose larvae form cysts in the host's muscle
Trematoda
class of Platyhelminthes known as flukes
cephalization
concentration of nerve cells at the anterior end
mastax
muscular organ used by rotifers to break food into small pieces
gastrovascular
cavity known as the gut, has a single opening
primary
host from which the parasite derives nourishment and reproduces sexually
intermediate
host in which the parasite larvae reproduce asexually
Tubellaria
class of free-living flatworms
flame cells
cells that collect excess water in the flatworm
Rotifera
phylum of pseudocoelomates with a crown of cilia surrounding their mouth
eyespots
sensory structure that determines intensity and direction of light
Cestoda
class of Platyhelminthes known as tapeworms
cerebral ganglia
two clusters of nerve cells that serve as a simple brain
proglottids
body sections of a tapeworm
hermaphrodites
have both male and female sex organs
cysts
dormant larvae surrounded by protective coverings
elephantiasis
caused by filarial worm, limbs become extremely swollen
acoelomate
absence of a body cavity
anus
opening at the posterior end through which wastes are eliminated
hookworm
type of roundworm with cutting plates in its mouth to help it attach to the intestinal wall
heartworm
filarial worm that infects the heart and arteries of dogs
pinworm
parasitic roundworm that lives in large intestine and lays eggs around the host's anus
Turbellaria
class of free-living flatworms
What is the body structure of Phylum Platyhelminthes? bilateral, 3 cell layers, acoelomates
What are examples of Phylum Platyhelminthes? flatworms
How do Platyhelminthes respirate? Diffusion because of no circulatory or respiratory system
What is the Platyhelminthes gastrovascular cavity? a gut and a single opening
Platyhelminthes are the first phylum to have what? cephalization
What are the four classes of Platyhelminthes? Turbellaria, Trematoda, Monogenea, Cestoda
What are examples of Class Turbellaria? planaria
How does Turbellaria move through the water?