Cestodes (PPT) Flashcards
Cestodes is otherwise known as:
Tapeworms
Cestodes constitutes a class of
Platyhelminthes
It is an anterior organ of attachment
Scolex
A chain of segments also known as strobila
Proglottids
It is elongated and protrusible structure situated in the center of the scolex
Rostellum
It is the organ of growth
Neck
Also known as false suckers
Bothria
It is an elongated mid-ventral and mid-dorsal grooves found in the spindle-shaped scolices of Psuedophyllidean worms
Bothria
Also known as true suckers
Bothridia
It is a muscular projections from the scolex and may have leaf-like margins
Bothridia
It is known as the ventral suckers
Acetabulum
It is a cup-shaped sucking disk with muscular wall
Acetabulum
Adult tapeworms maybe differentiated through the following features:
- Scolices or proglottids
- Taxonomic features:
- Scolex
- Hooks
- Rostellum
- Internal morphology for proglottids
A living tissue (syncitial membrane) which serves as a protective and digestive organ
Teguments
A minute microvilli which covers the tegument of the cestodes
Mictrotriches
A layer of carbohydrates containing macromolecules
glycocalyx
Inhibits host chymotrypsin, pancreatic lipase trypsin and to absorb bile salts
glycocalyx
Muscle cells of cestodes are:
- are characteristically slow-contracting
- Non-striated muscles and lacks T tubules
- Contains myocytons
Secretions found in the parenchyma of cestodes
Calcareous corpuscles
The calcareous corpuscles measures ____ um in diameter
12-32
Calcareous corpuscles contains inorganic components such as:
- calcium
-magnesium carbohydrates - calcium phosphate
It’s function is to hypothesized as being buffer against organic acids produced during metabolism
Calcareous corpuscles
Its function is as a depots for carbon dioxide and ion or they may be even excretory products
Calcareous corpuscle
Order Pseudophyllidea or Cyclophyllidea:
Scolex with bothria, with or without hooks
Order Pseudophyllidea
