Playthelminthes Flashcards
lacking a body cavity
acoelomate
protrusible organ projected through mouth of Platyhelminthes
pharynx
allows nutrients to pass through via lacunae in acanthocephala
tegument
cestode larval stage prior to cyscercus
oncosphere
body segments of tapeworms, the terminal end one full of eggs
proglottid
head of tapeworm with a combo of hooks and suckers for attachment
scolex
free swimming trematoda (fluke) larvae found in faeces of infected hosts
miracidium
class of parasites often referred to as flukes
trematoda
parasitic tapeworms that lack digestive tracts
cestoda
class of tubellarians and flatworms
Class Acentrosomata
a simple eye consisting of a single lens and a small number of sensory cells
ocellus
angled projections from the sides of the head, which gives some flatworms’ heads an arrow-shaped appearance. Contains a concentration of nerve cells
Auricle
rodlike structures in the cells of the epidermis or underlying parenchyma in certain turbellarians, and in the epidermis of nemerteans.
Rhabdites
a group of ectoparasitic flatworms commonly found on the skin, gills, or fins of fish.
Class Monogenea
An attachment hook, sylet, or sucker found in the parasitic platyhelminthes
Opisthaptor
the complex anterior attachment organ of a typical monogenetic trematode.
Prohaptor
ciliated and free-living larva of a monogenean
Onchomiracidium
a specialized sucker for parasitic adaptation in trematodes by which the worms are able to attach on the host
Acetabulum
worm-like body structure
vermiform
type of symmetry in Platyhelminthes
bilateral
which phylum does cephalization start to show?
the flatworms
distinct separation of the head
cephalization
how do flatworms remove waste?
diffusion and protonephridia
greater mobility requires ___ metabolism
greater
class of free living platyhelminths
class acentrosomata
how do flatworms in class acentrosomata move?
via mucus and ciliated ventral surface
recycled nematocysts or acids
tubercles
projectile like structure of flatworms that impales prey
stylet
characteristics of a parasitic lifestyle
resistant outer epidermis, attachment structures, limited systems, high number of eggs
definitive host of the flukes
vertebrates
flatworm ectoparasites of fish that attack the gills
monogeaens
