Trematodes Flashcards
Also known as
Flukes
Phylum
Platylhelminthes
Class
Trematoda
Order
Digenea
Trematodes are parasites with
holes
one feature is that this order is that they requires snails/mollusks as their IH
Order Digenea
Meaning of the word trematode
“Body
with holes”
Generalities
Appearance
flat and leaf-like
except Schistosoma species
Schistosoma appearance
cylindrical/elongated
Type of symetrality
bilaterally symmetrical
Are trematodes segmented
naur
non-cellular, outer covering of the
fluke
Tegument
Tegument may contain:
- spines
- tuberculations
Type of reproduction
monoecious
excepts Schistosoma species
refer to protruding structures
present on the surface
Tuberculations
incomplete alimentary canal meaning
they have no anus and
blind intestinal ceca
Posess _____ alimentary canal
incomplete
All possess ___ suckers
two
except Heterophyes
surround the mouth
suckers
Oral Sucker
used for
attachment
suckers
Ventral Sucker/Acetabulum
Exclusive for Heterophyes heterophyes
suckers
gonotyl/genital sucker
Reproductive organs are ____
well-developed
Body Cavity
Absent
absent organ systems:
- circulatory
- skeletal
- respiratory
Nervous system description
basic/rudimentary
Excretory system description
Bilaterally symmetrical
serve as their nervous system
ganglion cells
Contains the _________ and _________ that removes the waste products
Excretory system
collecting tubules and capillaries
the waste products will terminate ________
Excretory system
flame cells
Eggs are _____- except for Schistosoma species
operculated
Egg has a lid-like structure called the
_______
operculum
Except Schistoma spp.